* rewritten contact group support to support VCard3 CATEGORIES and VCard4-style KIND/MEMBER groups
* new account setting: contact group method (VCard3/VCard4/Apple "VCard4-as-VCard3")
* keep unknown properties when saving/generating VCards
* task list synchronization: don't set VISIBLE=1 and SYNC_ENABLED=1 at every sync, but only at creation
* task list synchronization: sync only task lists which are SYNC_ENABLED
* honor "manage calendar colors" account setting for task list colors, too
* add run-tests-connected.sh, to be used as pre-commit hook
* ical4android/vcard4android tests
* fetch translations from Transifex
* version bump to 1.0.7
* new setting: only sync in WiFi (or when sync is triggered manually)
* new setting: only sync in specific WiFI (by SSID)
* lower default sync interval when account is created to 4 hours (was 1 day)
* version bump to 1.0.6
* re-initialize logger in :sync process after changing the settings (IPC using broadcast)
* move settings from SharedPreferences (which is not multi-process-safe) to ServiceDB
* logger: show exception details
* settings: show debug info
* honour calendar-proxy-read/write-for property
* ignore errors when quering member groups for home sets
* remove home sets and collections from the service database not only on 404, but 403, 404 and 410
* fix crash bug when <displayname> was defined, but empty