diff --git a/docs/_isso/html5.py b/docs/_isso/html5.py
deleted file mode 100644
index d6138ab..0000000
--- a/docs/_isso/html5.py
+++ /dev/null
@@ -1,1298 +0,0 @@
-#:Author: David Goodger (goodger@python.org)
-#:Contributor: Michael Beaumont (mjboamail@gmail.com)
-#:Copyright: This module has been placed in the public domain.
-
-
-try:
-    str = unicode
-except NameError:
-    pass
-
-import sys
-import os
-import os.path
-import re
-import urllib
-
-try: # check for the Python Imaging Library
-    import PIL.Image
-except ImportError:
-    try:  # sometimes PIL modules are put in PYTHONPATH's root
-        import Image
-        class PIL(object): pass  # dummy wrapper
-        PIL.Image = Image
-    except ImportError:
-        PIL = None
-
-from docutils import nodes, utils
-from docutils.utils.math import unichar2tex, pick_math_environment, math2html
-from docutils.utils.math.latex2mathml import parse_latex_math
-
-from sphinx.writers.html import HTMLTranslator
-
-
-class Isso(HTMLTranslator):
-
-    def __init__(self, builder, *args, **kwds):
-        HTMLTranslator.__init__(self, builder, *args, **kwds)
-        self.initial_header_level = 1
-
-    def starttag(self, node, tagname, suffix='\n', empty=False, **attributes):
-        """
-        Construct and return a start tag given a node (id & class attributes
-        are extracted), tag name, and optional attributes.
-        """
-        tagname = tagname.lower()
-        prefix = []
-        atts = {}
-        ids = []
-        for (name, value) in list(attributes.items()):
-            atts[name.lower()] = value
-        classes = []
-        languages = []
-        # unify class arguments and move language specification
-        for cls in node.get('classes', []) + atts.pop('class', '').split() :
-            if cls.startswith('language-'):
-                languages.append(cls[9:])
-            elif cls.strip() and cls not in classes:
-                classes.append(cls)
-        if languages:
-            # attribute name is 'lang' in XHTML 1.0 but 'xml:lang' in 1.1
-            atts[self.lang_attribute] = languages[0]
-        if classes:
-            atts['class'] = ' '.join(classes)
-        assert 'id' not in atts
-        ids.extend(node.get('ids', []))
-        if 'ids' in atts:
-            ids.extend(atts['ids'])
-            del atts['ids']
-        if ids:
-            atts['id'] = ids[0]
-            for id in ids[1:]:
-                # Add empty "span" elements for additional IDs.  Note
-                # that we cannot use empty "a" elements because there
-                # may be targets inside of references, but nested "a"
-                # elements aren't allowed in XHTML (even if they do
-                # not all have a "href" attribute).
-                if empty:
-                    # Empty tag.  Insert target right in front of element.
-                    prefix.append('<span id="%s"></span>' % id)
-                else:
-                    # Non-empty tag.  Place the auxiliary <span> tag
-                    # *inside* the element, as the first child.
-                    suffix += '<span id="%s"></span>' % id
-        attlist = list(atts.items())
-        attlist.sort()
-        parts = [tagname]
-        for name, value in attlist:
-            # value=None was used for boolean attributes without
-            # value, but this isn't supported by XHTML.
-            assert value is not None
-            if isinstance(value, list):
-                values = [str(v) for v in value]
-                parts.append('%s="%s"' % (name.lower(),
-                                          self.attval(' '.join(values))))
-            else:
-                parts.append('%s="%s"' % (name.lower(),
-                                          self.attval(str(value))))
-        if empty:
-            infix = ' /'
-        else:
-            infix = ''
-        return ''.join(prefix) + '<%s%s>' % (' '.join(parts), infix) + suffix
-
-    def emptytag(self, node, tagname, suffix='\n', **attributes):
-        """Construct and return an XML-compatible empty tag."""
-        return self.starttag(node, tagname, suffix, empty=True, **attributes)
-
-    def set_class_on_child(self, node, class_, index=0):
-        """
-        Set class `class_` on the visible child no. index of `node`.
-        Do nothing if node has fewer children than `index`.
-        """
-        children = [n for n in node if not isinstance(n, nodes.Invisible)]
-        try:
-            child = children[index]
-        except IndexError:
-            return
-        child['classes'].append(class_)
-
-    def set_first_last(self, node):
-        self.set_class_on_child(node, 'first', 0)
-        self.set_class_on_child(node, 'last', -1)
-
-    def visit_Text(self, node):
-        text = node.astext()
-        encoded = self.encode(text)
-        if self.in_mailto and self.settings.cloak_email_addresses:
-            encoded = self.cloak_email(encoded)
-        self.body.append(encoded)
-
-    def depart_Text(self, node):
-        pass
-
-    def visit_abbreviation(self, node):
-        attrs = {}
-        if node.hasattr('explanation'):
-            attrs['title'] = node['explanation']
-        self.body.append(self.starttag(node, 'abbr', '', **attrs))
-
-    def depart_abbreviation(self, node):
-        self.body.append('</abbr>')
-
-    def visit_acronym(self, node):
-        # @@@ implementation incomplete ("title" attribute)
-        self.body.append(self.starttag(node, 'acronym', ''))
-
-    def depart_acronym(self, node):
-        self.body.append('</acronym>')
-
-    def visit_address(self, node):
-        self.visit_docinfo_item(node, 'address', meta=False)
-        self.body.append(self.starttag(node, 'pre', CLASS='address'))
-
-    def depart_address(self, node):
-        self.body.append('\n</pre>\n')
-        self.depart_docinfo_item()
-
-    def visit_admonition(self, node):
-        self.body.append(self.starttag(node, 'div'))
-        self.set_first_last(node)
-
-    def depart_admonition(self, node=None):
-        self.body.append('</div>\n')
-
-    attribution_formats = {'dash': ('&mdash;', ''),
-                           'parentheses': ('(', ')'),
-                           'parens': ('(', ')'),
-                           'none': ('', '')}
-
-    def visit_attribution(self, node):
-        prefix, suffix = self.attribution_formats[self.settings.attribution]
-        self.context.append(suffix)
-        self.body.append(
-            self.starttag(node, 'p', prefix, CLASS='attribution'))
-
-    def depart_attribution(self, node):
-        self.body.append(self.context.pop() + '</p>\n')
-
-    def visit_author(self, node):
-        if isinstance(node.parent, nodes.authors):
-            if self.author_in_authors:
-                self.body.append('\n<br />')
-        else:
-            self.visit_docinfo_item(node, 'author')
-
-    def depart_author(self, node):
-        if isinstance(node.parent, nodes.authors):
-            self.author_in_authors = True
-        else:
-            self.depart_docinfo_item()
-
-    def visit_authors(self, node):
-        self.visit_docinfo_item(node, 'authors')
-        self.author_in_authors = False  # initialize
-
-    def depart_authors(self, node):
-        self.depart_docinfo_item()
-
-    def visit_block_quote(self, node):
-        self.body.append(self.starttag(node, 'blockquote'))
-
-    def depart_block_quote(self, node):
-        self.body.append('</blockquote>\n')
-
-    def check_simple_list(self, node):
-        """Check for a simple list that can be rendered compactly."""
-        visitor = SimpleListChecker(self.document)
-        try:
-            node.walk(visitor)
-        except nodes.NodeFound:
-            return None
-        else:
-            return 1
-
-    def is_compactable(self, node):
-        return ('compact' in node['classes']
-                or (self.settings.compact_lists
-                    and 'open' not in node['classes']
-                    and (self.compact_simple
-                         or self.topic_classes == ['contents']
-                         or self.check_simple_list(node))))
-
-    def visit_bullet_list(self, node):
-        atts = {}
-        old_compact_simple = self.compact_simple
-        self.context.append((self.compact_simple, self.compact_p))
-        self.compact_p = None
-        self.compact_simple = self.is_compactable(node)
-        if self.compact_simple and not old_compact_simple:
-            atts['class'] = 'simple'
-        self.body.append(self.starttag(node, 'ul', **atts))
-
-    def depart_bullet_list(self, node):
-        self.compact_simple, self.compact_p = self.context.pop()
-        self.body.append('</ul>\n')
-
-    def visit_caption(self, node):
-        self.body.append(self.starttag(node, 'figcaption'))
-
-    def depart_caption(self, node):
-        self.body.append('</figcaption>\n')
-
-#changed
-    def visit_citation(self, node):
-        self.body.append(self.starttag(node, 'table',
-                                       CLASS='docutils citation',
-                                       frame="void", rules="none"))
-        self.body.append('<colgroup><col class="label" /><col /></colgroup>\n'
-                         '<tbody valign="top">\n'
-                         '<tr>')
-        self.footnote_backrefs(node)
-
-    def depart_citation(self, node):
-        self.body.append('</td></tr>\n'
-                         '</tbody>\n</table>\n')
-
-    def visit_citation_reference(self, node):
-        href = '#'
-        if 'refid' in node:
-            href += node['refid']
-        elif 'refname' in node:
-            href += self.document.nameids[node['refname']]
-        # else: # TODO system message (or already in the transform)?
-        # 'Citation reference missing.'
-        self.body.append(self.starttag(
-            node, 'a', '[', CLASS='citation-reference', href=href))
-
-    def depart_citation_reference(self, node):
-        self.body.append(']</a>')
-
-    def visit_classifier(self, node):
-        self.body.append(' <span class="classifier-delimiter">:</span> ')
-        self.body.append(self.starttag(node, 'span', '', CLASS='classifier'))
-
-    def depart_classifier(self, node):
-        self.body.append('</span>')
-
-    def visit_colspec(self, node):
-        self.colspecs.append(node)
-        # "stubs" list is an attribute of the tgroup element:
-        node.parent.stubs.append(node.attributes.get('stub'))
-
-    def depart_colspec(self, node):
-        pass
-
-    def write_colspecs(self):
-        width = 0
-        for node in self.colspecs:
-            width += node['colwidth']
-        for node in self.colspecs:
-            colwidth = int(node['colwidth'] * 100.0 / width + 0.5)
-            self.body.append(self.emptytag(node, 'col',
-                                           width='%i%%' % colwidth))
-        self.colspecs = []
-
-    def visit_comment(self, node,
-                      sub=re.compile('-(?=-)').sub):
-        """Escape double-dashes in comment text."""
-        self.body.append('<!-- %s -->\n' % sub('- ', node.astext()))
-        # Content already processed:
-        raise nodes.SkipNode
-
-    def visit_compound(self, node):
-        self.body.append(self.starttag(node, 'div', CLASS='compound'))
-        if len(node) > 1:
-            node[0]['classes'].append('compound-first')
-            node[-1]['classes'].append('compound-last')
-            for child in node[1:-1]:
-                child['classes'].append('compound-middle')
-
-    def depart_compound(self, node):
-        self.body.append('</div>\n')
-
-    def visit_container(self, node):
-        self.body.append(self.starttag(node, 'div', CLASS='container'))
-
-    def depart_container(self, node):
-        self.body.append('</div>\n')
-
-    def visit_contact(self, node):
-        self.visit_docinfo_item(node, 'contact', meta=False)
-
-    def depart_contact(self, node):
-        self.depart_docinfo_item()
-
-    def visit_copyright(self, node):
-        self.visit_docinfo_item(node, 'copyright')
-
-    def depart_copyright(self, node):
-        self.depart_docinfo_item()
-
-    def visit_date(self, node):
-        self.visit_docinfo_item(node, 'date')
-
-    def depart_date(self, node):
-        self.depart_docinfo_item()
-
-    def visit_decoration(self, node):
-        pass
-
-    def depart_decoration(self, node):
-        pass
-
-    def visit_definition(self, node):
-        self.body.append('</dt>\n')
-        self.body.append(self.starttag(node, 'dd', ''))
-        self.set_first_last(node)
-
-    def depart_definition(self, node):
-        self.body.append('</dd>\n')
-
-    def visit_definition_list(self, node):
-        self.body.append(self.starttag(node, 'dl', CLASS='docutils'))
-
-    def depart_definition_list(self, node):
-        self.body.append('</dl>\n')
-
-    def visit_definition_list_item(self, node):
-        pass
-
-    def depart_definition_list_item(self, node):
-        pass
-
-    def visit_description(self, node):
-        self.body.append(self.starttag(node, 'td', ''))
-        self.set_first_last(node)
-
-    def depart_description(self, node):
-        self.body.append('</td>')
-
-    def visit_docinfo(self, node):
-        self.context.append(len(self.body))
-        self.body.append(self.starttag(node, 'table',
-                                       CLASS='docinfo',
-                                       frame="void", rules="none"))
-        self.body.append('<col class="docinfo-name" />\n'
-                         '<col class="docinfo-content" />\n'
-                         '<tbody valign="top">\n')
-        self.in_docinfo = True
-
-    def depart_docinfo(self, node):
-        self.body.append('</tbody>\n</table>\n')
-        self.in_docinfo = False
-        start = self.context.pop()
-        self.docinfo = self.body[start:]
-        self.body = []
-
-    def visit_docinfo_item(self, node, name, meta=True):
-        if meta:
-            meta_tag = '<meta name="%s" content="%s" />\n' \
-                       % (name, self.attval(node.astext()))
-            self.add_meta(meta_tag)
-        self.body.append(self.starttag(node, 'tr', ''))
-        self.body.append('<th class="docinfo-name">%s:</th>\n<td>'
-                         % self.language.labels[name])
-        if len(node):
-            if isinstance(node[0], nodes.Element):
-                node[0]['classes'].append('first')
-            if isinstance(node[-1], nodes.Element):
-                node[-1]['classes'].append('last')
-
-    def depart_docinfo_item(self):
-        self.body.append('</td></tr>\n')
-
-    def visit_doctest_block(self, node):
-        self.body.append(self.starttag(node, 'pre', CLASS='doctest-block'))
-
-    def depart_doctest_block(self, node):
-        self.body.append('\n</pre>\n')
-
-    def visit_document(self, node):
-        self.head.append('<title>%s</title>\n'
-                         % self.encode(node.get('title', '')))
-
-    def depart_document(self, node):
-        self.head_prefix.extend([self.doctype,
-                                 self.head_prefix_template %
-                                 {'lang': self.settings.language_code}])
-        self.html_prolog.append(self.doctype)
-        self.meta.insert(0, self.content_type % self.settings.output_encoding)
-        self.head.insert(0, self.content_type % self.settings.output_encoding)
-        if self.math_header:
-            if self.math_output == 'mathjax':
-                self.head.extend(self.math_header)
-            else:
-                self.stylesheet.extend(self.math_header)
-        # skip content-type meta tag with interpolated charset value:
-        self.html_head.extend(self.head[1:])
-        self.body_prefix.append(self.starttag(node, 'div', CLASS='document'))
-        self.body_suffix.insert(0, '</div>\n')
-        self.fragment.extend(self.body) # self.fragment is the "naked" body
-        self.html_body.extend(self.body_prefix[1:] + self.body_pre_docinfo
-                              + self.docinfo + self.body
-                              + self.body_suffix[:-1])
-        assert not self.context, 'len(context) = %s' % len(self.context)
-
-    def visit_emphasis(self, node):
-        self.body.append(self.starttag(node, 'em', ''))
-
-    def depart_emphasis(self, node):
-        self.body.append('</em>')
-
-    def visit_entry(self, node):
-        atts = {'class': []}
-        if isinstance(node.parent.parent, nodes.thead):
-            atts['class'].append('head')
-        if node.parent.parent.parent.stubs[node.parent.column]:
-            # "stubs" list is an attribute of the tgroup element
-            atts['class'].append('stub')
-        if atts['class']:
-            tagname = 'th'
-            atts['class'] = ' '.join(atts['class'])
-        else:
-            tagname = 'td'
-            del atts['class']
-        node.parent.column += 1
-        if 'morerows' in node:
-            atts['rowspan'] = node['morerows'] + 1
-        if 'morecols' in node:
-            atts['colspan'] = node['morecols'] + 1
-            node.parent.column += node['morecols']
-        self.body.append(self.starttag(node, tagname, '', **atts))
-        self.context.append('</%s>\n' % tagname.lower())
-        if len(node) == 0:              # empty cell
-            self.body.append('&nbsp;')
-        self.set_first_last(node)
-
-    def depart_entry(self, node):
-        self.body.append(self.context.pop())
-
-    def visit_enumerated_list(self, node):
-        atts = {}
-        if 'start' in node:
-            atts['start'] = node['start']
-        if 'enumtype' in node:
-            atts['class'] = node['enumtype']
-        # @@@ To do: prefix, suffix. How? Change prefix/suffix to a
-        # single "format" attribute? Use CSS2?
-        old_compact_simple = self.compact_simple
-        self.context.append((self.compact_simple, self.compact_p))
-        self.compact_p = None
-        self.compact_simple = self.is_compactable(node)
-        if self.compact_simple and not old_compact_simple:
-            atts['class'] = (atts.get('class', '') + ' simple').strip()
-        self.body.append(self.starttag(node, 'ol', **atts))
-
-    def depart_enumerated_list(self, node):
-        self.compact_simple, self.compact_p = self.context.pop()
-        self.body.append('</ol>\n')
-
-    def visit_field(self, node):
-        self.body.append(self.starttag(node, 'tr', '', CLASS='field'))
-
-    def depart_field(self, node):
-        self.body.append('</tr>\n')
-
-    def visit_field_body(self, node):
-        self.body.append(self.starttag(node, 'td', '', CLASS='field-body'))
-        self.set_class_on_child(node, 'first', 0)
-        field = node.parent
-        if (self.compact_field_list or
-            isinstance(field.parent, nodes.docinfo) or
-            field.parent.index(field) == len(field.parent) - 1):
-            # If we are in a compact list, the docinfo, or if this is
-            # the last field of the field list, do not add vertical
-            # space after last element.
-            self.set_class_on_child(node, 'last', -1)
-
-    def depart_field_body(self, node):
-        self.body.append('</td>\n')
-
-    def visit_field_list(self, node):
-        self.context.append((self.compact_field_list, self.compact_p))
-        self.compact_p = None
-        if 'compact' in node['classes']:
-            self.compact_field_list = True
-        elif (self.settings.compact_field_lists
-              and 'open' not in node['classes']):
-            self.compact_field_list = True
-        if self.compact_field_list:
-            for field in node:
-                field_body = field[-1]
-                assert isinstance(field_body, nodes.field_body)
-                children = [n for n in field_body
-                            if not isinstance(n, nodes.Invisible)]
-                if not (len(children) == 0 or
-                        len(children) == 1 and
-                        isinstance(children[0],
-                                   (nodes.paragraph, nodes.line_block))):
-                    self.compact_field_list = False
-                    break
-        self.body.append(self.starttag(node, 'table', frame='void',
-                                       rules='none',
-                                       CLASS='docutils field-list'))
-        self.body.append('<col class="field-name" />\n'
-                         '<col class="field-body" />\n'
-                         '<tbody valign="top">\n')
-
-    def depart_field_list(self, node):
-        self.body.append('</tbody>\n</table>\n')
-        self.compact_field_list, self.compact_p = self.context.pop()
-
-    def visit_field_name(self, node):
-        atts = {}
-        if self.in_docinfo:
-            atts['class'] = 'docinfo-name'
-        else:
-            atts['class'] = 'field-name'
-        if ( self.settings.field_name_limit
-             and len(node.astext()) > self.settings.field_name_limit):
-            atts['colspan'] = 2
-            self.context.append('</tr>\n'
-                                + self.starttag(node.parent, 'tr', '',
-                                                CLASS='field')
-                                + '<td>&nbsp;</td>')
-        else:
-            self.context.append('')
-        self.body.append(self.starttag(node, 'th', '', **atts))
-
-    def depart_field_name(self, node):
-        self.body.append(':</th>')
-        self.body.append(self.context.pop())
-
-    def visit_figure(self, node):
-        atts = {'class': 'figure'}
-        if node.get('width'):
-            atts['style'] = 'width: %s' % node['width']
-        if node.get('align'):
-            atts['class'] += " align-" + node['align']
-        self.body.append(self.starttag(node, 'figure', **atts))
-
-    def depart_figure(self, node):
-        self.body.append('</figure>\n')
-
-    def visit_footer(self, node):
-        self.context.append(len(self.body))
-
-    def depart_footer(self, node):
-        start = self.context.pop()
-        footer = [self.starttag(node, 'footer'),
-                  '<hr class="footer" />\n']
-        footer.extend(self.body[start:])
-        footer.append('\n</footer>\n')
-        self.footer.extend(footer)
-        self.body_suffix[:0] = footer
-        del self.body[start:]
-
-    def visit_footnote(self, node):
-        self.body.append(self.starttag(node, 'table',
-                                       CLASS='docutils footnote',
-                                       frame="void", rules="none"))
-        self.body.append('<colgroup><col class="label" /><col /></colgroup>\n'
-                         '<tbody valign="top">\n'
-                         '<tr>')
-        self.footnote_backrefs(node)
-
-    def footnote_backrefs(self, node):
-        backlinks = []
-        backrefs = node['backrefs']
-        if self.settings.footnote_backlinks and backrefs:
-            if len(backrefs) == 1:
-                self.context.append('')
-                self.context.append('</a>')
-                self.context.append('<a class="fn-backref" href="#%s">'
-                                    % backrefs[0])
-            else:
-                i = 1
-                for backref in backrefs:
-                    backlinks.append('<a class="fn-backref" href="#%s">%s</a>'
-                                     % (backref, i))
-                    i += 1
-                self.context.append('<em>(%s)</em> ' % ', '.join(backlinks))
-                self.context += ['', '']
-        else:
-            self.context.append('')
-            self.context += ['', '']
-        # If the node does not only consist of a label.
-        if len(node) > 1:
-            # If there are preceding backlinks, we do not set class
-            # 'first', because we need to retain the top-margin.
-            if not backlinks:
-                node[1]['classes'].append('first')
-            node[-1]['classes'].append('last')
-
-    def depart_footnote(self, node):
-        self.body.append('</td></tr>\n'
-                         '</tbody>\n</table>\n')
-
-    def visit_footnote_reference(self, node):
-        href = '#' + node['refid']
-        format = self.settings.footnote_references
-        if format == 'brackets':
-            suffix = '['
-            self.context.append(']')
-        else:
-            assert format == 'superscript'
-            suffix = '<sup>'
-            self.context.append('</sup>')
-        self.body.append(self.starttag(node, 'a', suffix,
-                                       CLASS='footnote-reference', href=href))
-
-    def depart_footnote_reference(self, node):
-        self.body.append(self.context.pop() + '</a>')
-
-    def visit_generated(self, node):
-        pass
-
-    def depart_generated(self, node):
-        pass
-
-    def visit_header(self, node):
-        self.context.append(len(self.body))
-
-    def depart_header(self, node):
-        start = self.context.pop()
-        header = [self.starttag(node, 'header')]
-        header.extend(self.body[start:])
-        header.append('\n<hr class="header"/>\n</header>\n')
-        self.body_prefix.extend(header)
-        self.header.extend(header)
-        del self.body[start:]
-
-    def visit_image(self, node):
-        atts = {}
-        uri = node['uri']
-        # place SVG and SWF images in an <object> element
-        types = {'.svg': 'image/svg+xml',
-                 '.swf': 'application/x-shockwave-flash'}
-        ext = os.path.splitext(uri)[1].lower()
-        if ext in ('.svg', '.swf'):
-            atts['data'] = uri
-            atts['type'] = types[ext]
-        else:
-            atts['src'] = uri
-            atts['alt'] = node.get('alt', uri)
-        # image size
-        if 'width' in node:
-            atts['width'] = node['width']
-        if 'height' in node:
-            atts['height'] = node['height']
-        if 'scale' in node:
-            if (PIL and not ('width' in node and 'height' in node)
-                and self.settings.file_insertion_enabled):
-                imagepath = urllib.url2pathname(uri)
-                try:
-                    img = PIL.Image.open(
-                            imagepath.encode(sys.getfilesystemencoding()))
-                except (IOError, UnicodeEncodeError):
-                    pass # TODO: warn?
-                else:
-                    self.settings.record_dependencies.add(
-                        imagepath.replace('\\', '/'))
-                    if 'width' not in atts:
-                        atts['width'] = str(img.size[0])
-                    if 'height' not in atts:
-                        atts['height'] = str(img.size[1])
-                    del img
-            for att_name in 'width', 'height':
-                if att_name in atts:
-                    match = re.match(r'([0-9.]+)(\S*)$', atts[att_name])
-                    assert match
-                    atts[att_name] = '%s%s' % (
-                        float(match.group(1)) * (float(node['scale']) / 100),
-                        match.group(2))
-        style = []
-        for att_name in 'width', 'height':
-            if att_name in atts:
-                if re.match(r'^[0-9.]+$', atts[att_name]):
-                    # Interpret unitless values as pixels.
-                    atts[att_name] += 'px'
-                style.append('%s: %s;' % (att_name, atts[att_name]))
-                del atts[att_name]
-        if style:
-            atts['style'] = ' '.join(style)
-        if (isinstance(node.parent, nodes.TextElement) or
-            (isinstance(node.parent, nodes.reference) and
-             not isinstance(node.parent.parent, nodes.TextElement))):
-            # Inline context or surrounded by <a>...</a>.
-            suffix = ''
-        else:
-            suffix = '\n'
-        if 'align' in node:
-            atts['class'] = 'align-%s' % node['align']
-        self.context.append('')
-        if ext in ('.svg', '.swf'): # place in an object element,
-            # do NOT use an empty tag: incorrect rendering in browsers
-            self.body.append(self.starttag(node, 'object', suffix, **atts) +
-                             node.get('alt', uri) + '</object>' + suffix)
-        else:
-            self.body.append(self.emptytag(node, 'img', suffix, **atts))
-
-    def depart_image(self, node):
-        self.body.append(self.context.pop())
-
-    def visit_inline(self, node):
-        self.body.append(self.starttag(node, 'span', ''))
-
-    def depart_inline(self, node):
-        self.body.append('</span>')
-
-    def visit_label(self, node):
-        # Context added in footnote_backrefs.
-        self.body.append(self.starttag(node, 'td', '%s[' % self.context.pop(),
-                                       CLASS='label'))
-
-    def depart_label(self, node):
-        # Context added in footnote_backrefs.
-        self.body.append(']%s</td><td>%s' % (self.context.pop(), self.context.pop()))
-
-    def visit_legend(self, node):
-        self.body.append(self.starttag(node, 'div', CLASS='legend'))
-
-    def depart_legend(self, node):
-        self.body.append('</div>\n')
-
-    def visit_line(self, node):
-        self.body.append(self.starttag(node, 'div', suffix='', CLASS='line'))
-        if not len(node):
-            self.body.append('<br />')
-
-    def depart_line(self, node):
-        self.body.append('</div>\n')
-
-    def visit_line_block(self, node):
-        self.body.append(self.starttag(node, 'div', CLASS='line-block'))
-
-    def depart_line_block(self, node):
-        self.body.append('</div>\n')
-
-    def visit_list_item(self, node):
-        self.body.append(self.starttag(node, 'li', ''))
-        if len(node):
-            node[0]['classes'].append('first')
-
-    def visit_math(self, node, math_env=''):
-        # If the method is called from visit_math_block(), math_env != ''.
-
-        # As there is no native HTML math support, we provide alternatives:
-        # LaTeX and MathJax math_output modes simply wrap the content,
-        # HTML and MathML math_output modes also convert the math_code.
-        if self.math_output not in ('mathml', 'html', 'mathjax', 'latex'):
-            self.document.reporter.error(
-                'math-output format "%s" not supported '
-                'falling back to "latex"'% self.math_output)
-            self.math_output = 'latex'
-        #
-        # HTML container
-        tags = {# math_output: (block, inline, class-arguments)
-                'mathml':      ('div', '', ''),
-                'html':        ('div', 'span', 'formula'),
-                'mathjax':     ('div', 'span', 'math'),
-                'latex':       ('pre', 'tt',   'math'),
-               }
-        tag = tags[self.math_output][math_env == '']
-        clsarg = tags[self.math_output][2]
-        # LaTeX container
-        wrappers = {# math_mode: (inline, block)
-                    'mathml':  (None,     None),
-                    'html':    ('$%s$',   u'\\begin{%s}\n%s\n\\end{%s}'),
-                    'mathjax': ('\(%s\)', u'\\begin{%s}\n%s\n\\end{%s}'),
-                    'latex':   (None,     None),
-                   }
-        wrapper = wrappers[self.math_output][math_env != '']
-        # get and wrap content
-        math_code = node.astext().translate(unichar2tex.uni2tex_table)
-        if wrapper and math_env:
-            math_code = wrapper % (math_env, math_code, math_env)
-        elif wrapper:
-            math_code = wrapper % math_code
-        # settings and conversion
-        if self.math_output in ('latex', 'mathjax'):
-            math_code = self.encode(math_code)
-        if self.math_output == 'mathjax' and not self.math_header:
-            if self.math_output_options:
-                self.mathjax_url = self.math_output_options[0]
-            self.math_header = [self.mathjax_script % self.mathjax_url]
-        elif self.math_output == 'html':
-            if self.math_output_options and not self.math_header:
-                self.math_header = [self.stylesheet_call(
-                    utils.find_file_in_dirs(s, self.settings.stylesheet_dirs))
-                    for s in self.math_output_options[0].split(',')]
-            # TODO: fix display mode in matrices and fractions
-            math2html.DocumentParameters.displaymode = (math_env != '')
-            math_code = math2html.math2html(math_code)
-        elif self.math_output == 'mathml':
-            self.doctype = self.doctype_mathml
-            self.content_type = self.content_type_mathml
-            try:
-                mathml_tree = parse_latex_math(math_code, inline=not(math_env))
-                math_code = ''.join(mathml_tree.xml())
-            except SyntaxError as err:
-                err_node = self.document.reporter.error(err, base_node=node)
-                self.visit_system_message(err_node)
-                self.body.append(self.starttag(node, 'p'))
-                self.body.append(u','.join(err.args))
-                self.body.append('</p>\n')
-                self.body.append(self.starttag(node, 'pre',
-                                               CLASS='literal-block'))
-                self.body.append(self.encode(math_code))
-                self.body.append('\n</pre>\n')
-                self.depart_system_message(err_node)
-                raise nodes.SkipNode
-        # append to document body
-        if tag:
-            self.body.append(self.starttag(node, tag,
-                                           suffix='\n'*bool(math_env),
-                                           CLASS=clsarg))
-        self.body.append(math_code)
-        if math_env:
-            self.body.append('\n')
-        if tag:
-            self.body.append('</%s>\n' % tag)
-        # Content already processed:
-        raise nodes.SkipNode
-
-    def depart_math(self, node):
-        pass # never reached
-
-    def visit_math_block(self, node):
-        # print node.astext().encode('utf8')
-        math_env = pick_math_environment(node.astext())
-        self.visit_math(node, math_env=math_env)
-
-    def depart_math_block(self, node):
-        pass # never reached
-
-    def visit_meta(self, node):
-        meta = self.emptytag(node, 'meta', **node.non_default_attributes())
-        self.add_meta(meta)
-
-    def depart_meta(self, node):
-        pass
-
-    def add_meta(self, tag):
-        self.meta.append(tag)
-        self.head.append(tag)
-
-    def visit_option(self, node):
-        if self.context[-1]:
-            self.body.append(', ')
-        self.body.append(self.starttag(node, 'span', '', CLASS='option'))
-
-    def depart_option(self, node):
-        self.body.append('</span>')
-        self.context[-1] += 1
-
-    def visit_option_argument(self, node):
-        self.body.append(node.get('delimiter', ' '))
-        self.body.append(self.starttag(node, 'var', ''))
-
-    def depart_option_argument(self, node):
-        self.body.append('</var>')
-
-    def visit_option_group(self, node):
-        atts = {}
-        if ( self.settings.option_limit
-             and len(node.astext()) > self.settings.option_limit):
-            atts['colspan'] = 2
-            self.context.append('</tr>\n<tr><td>&nbsp;</td>')
-        else:
-            self.context.append('')
-        self.body.append(
-            self.starttag(node, 'td', CLASS='option-group', **atts))
-        self.body.append('<kbd>')
-        self.context.append(0)          # count number of options
-
-    def depart_option_group(self, node):
-        self.context.pop()
-        self.body.append('</kbd></td>\n')
-        self.body.append(self.context.pop())
-
-    def visit_option_list(self, node):
-        self.body.append(
-              self.starttag(node, 'table', CLASS='docutils option-list',
-                            frame="void", rules="none"))
-        self.body.append('<col class="option" />\n'
-                         '<col class="description" />\n'
-                         '<tbody valign="top">\n')
-
-    def depart_option_list(self, node):
-        self.body.append('</tbody>\n</table>\n')
-
-    def visit_option_list_item(self, node):
-        self.body.append(self.starttag(node, 'tr', ''))
-
-    def depart_option_list_item(self, node):
-        self.body.append('</tr>\n')
-
-    def visit_option_string(self, node):
-        pass
-
-    def depart_option_string(self, node):
-        pass
-
-    def visit_organization(self, node):
-        self.visit_docinfo_item(node, 'organization')
-
-    def depart_organization(self, node):
-        self.depart_docinfo_item()
-
-    def should_be_compact_paragraph(self, node):
-        """
-        Determine if the <p> tags around paragraph ``node`` can be omitted.
-        """
-        if (isinstance(node.parent, nodes.document) or
-            isinstance(node.parent, nodes.compound)):
-            # Never compact paragraphs in document or compound.
-            return False
-        for key, value in node.attlist():
-            if (node.is_not_default(key) and
-                not (key == 'classes' and value in
-                     ([], ['first'], ['last'], ['first', 'last']))):
-                # Attribute which needs to survive.
-                return False
-        first = isinstance(node.parent[0], nodes.label) # skip label
-        for child in node.parent.children[first:]:
-            # only first paragraph can be compact
-            if isinstance(child, nodes.Invisible):
-                continue
-            if child is node:
-                break
-            return False
-        parent_length = len([n for n in node.parent if not isinstance(
-            n, (nodes.Invisible, nodes.label))])
-        if ( self.compact_simple
-             or self.compact_field_list
-             or self.compact_p and parent_length == 1):
-            return True
-        return False
-
-    def visit_paragraph(self, node):
-        if self.should_be_compact_paragraph(node):
-            self.context.append('')
-        else:
-            self.body.append(self.starttag(node, 'p', ''))
-            self.context.append('</p>\n')
-
-    def depart_paragraph(self, node):
-        self.body.append(self.context.pop())
-
-    def visit_problematic(self, node):
-        if node.hasattr('refid'):
-            self.body.append('<a href="#%s">' % node['refid'])
-            self.context.append('</a>')
-        else:
-            self.context.append('')
-        self.body.append(self.starttag(node, 'span', '', CLASS='problematic'))
-
-    def depart_problematic(self, node):
-        self.body.append('</span>')
-        self.body.append(self.context.pop())
-
-    def visit_raw(self, node):
-        if 'html' in node.get('format', '').split():
-            t = isinstance(node.parent, nodes.TextElement) and 'span' or 'div'
-            if node['classes']:
-                self.body.append(self.starttag(node, t, suffix=''))
-            self.body.append(node.astext())
-            if node['classes']:
-                self.body.append('</%s>' % t)
-        # Keep non-HTML raw text out of output:
-        raise nodes.SkipNode
-
-    def visit_reference(self, node):
-        atts = {'class': 'reference'}
-        if 'refuri' in node:
-            atts['href'] = node['refuri']
-            if ( self.settings.cloak_email_addresses
-                 and atts['href'].startswith('mailto:')):
-                atts['href'] = self.cloak_mailto(atts['href'])
-                self.in_mailto = True
-            atts['class'] += ' external'
-        else:
-            assert 'refid' in node, \
-                   'References must have "refuri" or "refid" attribute.'
-            atts['href'] = '#' + node['refid']
-            atts['class'] += ' internal'
-        if not isinstance(node.parent, nodes.TextElement):
-            assert len(node) == 1 and isinstance(node[0], nodes.image)
-            atts['class'] += ' image-reference'
-        self.body.append(self.starttag(node, 'a', '', **atts))
-
-    def depart_reference(self, node):
-        self.body.append('</a>')
-        if not isinstance(node.parent, nodes.TextElement):
-            self.body.append('\n')
-        self.in_mailto = False
-
-    def visit_revision(self, node):
-        self.visit_docinfo_item(node, 'revision', meta=False)
-
-    def depart_revision(self, node):
-        self.depart_docinfo_item()
-
-    def visit_row(self, node):
-        self.body.append(self.starttag(node, 'tr', ''))
-        node.column = 0
-
-    def depart_row(self, node):
-        self.body.append('</tr>\n')
-
-    def visit_rubric(self, node):
-        self.body.append(self.starttag(node, 'p', '', CLASS='rubric'))
-
-    def depart_rubric(self, node):
-        self.body.append('</p>\n')
-
-    def visit_section(self, node):
-        self.section_level += 1
-        self.body.append(self.starttag(node, 'section'))
-
-    def depart_section(self, node):
-        self.section_level -= 1
-        self.body.append('</section>\n')
-
-    def visit_sidebar(self, node):
-        self.body.append(
-            self.starttag(node, 'aside'))
-        self.set_first_last(node)
-        self.in_sidebar = True
-
-    def depart_sidebar(self, node):
-        self.body.append('</aside>\n')
-        self.in_sidebar = False
-
-    def visit_status(self, node):
-        self.visit_docinfo_item(node, 'status', meta=False)
-
-    def depart_status(self, node):
-        self.depart_docinfo_item()
-
-    def visit_strong(self, node):
-        self.body.append(self.starttag(node, 'strong', ''))
-
-    def depart_strong(self, node):
-        self.body.append('</strong>')
-
-    def visit_subscript(self, node):
-        self.body.append(self.starttag(node, 'sub', ''))
-
-    def depart_subscript(self, node):
-        self.body.append('</sub>')
-
-    def visit_substitution_definition(self, node):
-        """Internal only."""
-        raise nodes.SkipNode
-
-    def visit_substitution_reference(self, node):
-        self.unimplemented_visit(node)
-
-    def visit_subtitle(self, node):
-        if isinstance(node.parent, nodes.sidebar):
-            self.body.append(self.starttag(node, 'p', '',
-                                           CLASS='sidebar-subtitle'))
-            self.context.append('</p>\n')
-        elif isinstance(node.parent, nodes.document):
-            self.body.append(self.starttag(node, 'h2', '', CLASS='subtitle'))
-            self.context.append('</h2>\n')
-            self.in_document_title = len(self.body)
-        elif isinstance(node.parent, nodes.section):
-            tag = 'h%s' % (self.section_level + self.initial_header_level - 1)
-            self.body.append(
-                self.starttag(node, tag, '', CLASS='section-subtitle') +
-                self.starttag({}, 'span', '', CLASS='section-subtitle'))
-            self.context.append('</span></%s>\n' % tag)
-
-    def depart_subtitle(self, node):
-        self.body.append(self.context.pop())
-        if self.in_document_title:
-            self.subtitle = self.body[self.in_document_title:-1]
-            self.in_document_title = 0
-            self.body_pre_docinfo.extend(self.body)
-            self.html_subtitle.extend(self.body)
-            del self.body[:]
-
-    def visit_superscript(self, node):
-        self.body.append(self.starttag(node, 'sup', ''))
-
-    def depart_superscript(self, node):
-        self.body.append('</sup>')
-
-    def visit_system_message(self, node):
-        self.body.append(self.starttag(node, 'div', CLASS='system-message'))
-        self.body.append('<p class="system-message-title">')
-        backref_text = ''
-        if len(node['backrefs']):
-            backrefs = node['backrefs']
-            if len(backrefs) == 1:
-                backref_text = ('; <em><a href="#%s">backlink</a></em>'
-                                % backrefs[0])
-            else:
-                i = 1
-                backlinks = []
-                for backref in backrefs:
-                    backlinks.append('<a href="#%s">%s</a>' % (backref, i))
-                    i += 1
-                backref_text = ('; <em>backlinks: %s</em>'
-                                % ', '.join(backlinks))
-        if node.hasattr('line'):
-            line = ', line %s' % node['line']
-        else:
-            line = ''
-        self.body.append('System Message: %s/%s '
-                         '(<tt class="docutils">%s</tt>%s)%s</p>\n'
-                         % (node['type'], node['level'],
-                            self.encode(node['source']), line, backref_text))
-
-    def depart_system_message(self, node):
-        self.body.append('</div>\n')
-
-    def visit_table(self, node):
-        self.context.append(self.compact_p)
-        self.compact_p = True
-        classes = ' '.join(['docutils', self.settings.table_style]).strip()
-        self.body.append(
-            self.starttag(node, 'table', CLASS=classes, border="1"))
-
-    def depart_table(self, node):
-        self.compact_p = self.context.pop()
-        self.body.append('</table>\n')
-
-    def visit_target(self, node):
-        if not ('refuri' in node or 'refid' in node
-                or 'refname' in node):
-            self.body.append(self.starttag(node, 'span', '', CLASS='target'))
-            self.context.append('</span>')
-        else:
-            self.context.append('')
-
-    def depart_target(self, node):
-        self.body.append(self.context.pop())
-
-    def visit_tbody(self, node):
-        self.write_colspecs()
-        self.body.append(self.context.pop()) # '</colgroup>\n' or ''
-        self.body.append(self.starttag(node, 'tbody', valign='top'))
-
-    def depart_tbody(self, node):
-        self.body.append('</tbody>\n')
-
-    def visit_term(self, node):
-        self.body.append(self.starttag(node, 'dt', ''))
-
-    def depart_term(self, node):
-        """
-        Leave the end tag to `self.visit_definition()`, in case there's a
-        classifier.
-        """
-        pass
-
-    def visit_tgroup(self, node):
-        # Mozilla needs <colgroup>:
-        self.body.append(self.starttag(node, 'colgroup'))
-        # Appended by thead or tbody:
-        self.context.append('</colgroup>\n')
-        node.stubs = []
-
-    def depart_tgroup(self, node):
-        pass
-
-    def visit_thead(self, node):
-        self.write_colspecs()
-        self.body.append(self.context.pop()) # '</colgroup>\n'
-        # There may or may not be a <thead>; this is for <tbody> to use:
-        self.context.append('')
-        self.body.append(self.starttag(node, 'thead', valign='bottom'))
-
-    def depart_thead(self, node):
-        self.body.append('</thead>\n')
-
-    def visit_title(self, node):
-        if self.section_level == 1:
-            raise nodes.SkipNode
-        HTMLTranslator.visit_title(self, node)
-
-    def depart_title(self, node):
-        self.body.append(self.context.pop())
-        if self.in_document_title:
-            self.title = self.body[self.in_document_title:-1]
-            self.in_document_title = 0
-            self.body_pre_docinfo.extend(self.body)
-            self.html_title.extend(self.body)
-            del self.body[:]
-
-    def visit_title_reference(self, node):
-        self.body.append(self.starttag(node, 'cite', ''))
-
-    def depart_title_reference(self, node):
-        self.body.append('</cite>')
-
-    def visit_topic(self, node):
-        self.body.append(self.starttag(node, 'section', CLASS='topic'))
-        self.topic_classes = node['classes']
-
-    def depart_topic(self, node):
-        self.body.append('</section>\n')
-        self.topic_classes = []
-
-    def visit_transition(self, node):
-        self.body.append(self.emptytag(node, 'hr', CLASS='docutils'))
-
-    def depart_transition(self, node):
-        pass
-
-    def visit_version(self, node):
-        self.visit_docinfo_item(node, 'version', meta=False)
-
-    def depart_version(self, node):
-        self.depart_docinfo_item()
-
-    def unimplemented_visit(self, node):
-        raise NotImplementedError('visiting unimplemented node type: %s'
-                                  % node.__class__.__name__)
-
-
-class SimpleListChecker(nodes.GenericNodeVisitor):
-
-    """
-    Raise `nodes.NodeFound` if non-simple list item is encountered.
-
-    Here "simple" means a list item containing nothing other than a single
-    paragraph, a simple list, or a paragraph followed by a simple list.
-    """
-
-    def default_visit(self, node):
-        raise nodes.NodeFound
-
-    def visit_bullet_list(self, node):
-        pass
-
-    def visit_enumerated_list(self, node):
-        pass
-
-    def visit_list_item(self, node):
-        children = []
-        for child in node.children:
-            if not isinstance(child, nodes.Invisible):
-                children.append(child)
-        if (children and isinstance(children[0], nodes.paragraph)
-            and (isinstance(children[-1], nodes.bullet_list)
-                 or isinstance(children[-1], nodes.enumerated_list))):
-            children.pop()
-        if len(children) <= 1:
-            return
-        else:
-            raise nodes.NodeFound
-
-    def visit_paragraph(self, node):
-        raise nodes.SkipNode
-
-    def invisible_visit(self, node):
-        """Invisible nodes should be ignored."""
-        raise nodes.SkipNode
-
-    visit_comment = invisible_visit
-    visit_substitution_definition = invisible_visit
-    visit_target = invisible_visit
-    visit_pending = invisible_visit
diff --git a/docs/_static/css/site.scss b/docs/_static/css/site.scss
index 4ab49f9..3c24238 100644
--- a/docs/_static/css/site.scss
+++ b/docs/_static/css/site.scss
@@ -298,6 +298,10 @@ main {
       overflow: auto;
     }
 
+    .headerlink {
+      visibility: hidden;
+    }
+
     p + p {
       margin-top: 1em;
     }
diff --git a/docs/docs/extras/deployment.rst b/docs/docs/extras/deployment.rst
new file mode 100644
index 0000000..e69de29
diff --git a/docs/docutils.conf b/docs/docutils.conf
new file mode 100644
index 0000000..b5f8b03
--- /dev/null
+++ b/docs/docutils.conf
@@ -0,0 +1,2 @@
+[html4css1 writer]
+initial_header_level: 2