Updated README

Changed branches to tags to avoid duplication of PRs, updated links in README to point to tags (releases)

README.md

@@ -2,11 +2,11 @@
 
 Mastering Bitcoin is a book for developers, but the first two chapters cover bitcoin at a level that is approachable to non-programmers. Anyone with a basic understanding of technology can read the first two chapters and get a great understanding of bitcoin.
 
-This repository contains the complete [first edition](https://github.com/bitcoinbook/bitcoinbook/tree/first_edition), published in Dec 2014, and the complete [second edition](https://github.com/bitcoinbook/bitcoinbook/tree/second_edition), published in June 2017.
+This repository contains the complete [first edition, second print](https://github.com/bitcoinbook/bitcoinbook/releases/tag/Edition1Print2), published in Dec 2014, and the complete [second edition, second print](https://github.com/bitcoinbook/bitcoinbook/releases/tag/second_edition_print2), published in July 2017, as published by O'Reilly Media in paperback and ebook formats.
 
 # Issues, Errors, Comments, Contributions
 
-If you know how to make a pull request to contribute a fix, please write the correction and use a pull request to submit it for consideration against the [develop branch](https://github.com/bitcoinbook/bitcoinbook/tree/develop). Otherwise, please submit an issue, explaining the error or comment. If you would like to contribute extensive changes or new material, please coordinate with the author first. Contact forms can be found on his website https://antonopoulos.com/
+If you know how to make a pull request to contribute a fix, please write the correction and use a pull request to submit it for consideration against the [develop branch](https://github.com/bitcoinbook/bitcoinbook/tree/develop). If you are making several changes, please use a separate commit for each to make it easier to cherry-pick or resolve conflicts. Otherwise, please submit an issue, explaining the error or comment. If you would like to contribute extensive changes or new material, please coordinate with the author first. Contact forms can be found on his website https://antonopoulos.com/
 
 # Reading this book (Where is the PDF?)
 
@@ -20,11 +20,11 @@ Please don't create or distribute PDFs until the license is changed to CC-BY-SA.
 
 # Published
 
-"Mastering Bitcoin (Second Edition): Programming the Open Blockchain" is now available in paperback and e-book formats by many book sellers, worldwide:
+"Mastering Bitcoin (Second Edition, Second Print): Programming the Open Blockchain" is now available in paperback and e-book formats by many book sellers, worldwide:
 
 * [Amazon](https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388)
 
-Mastering Bitcoin (First Edition) is also published in Japanese, Korean and Chinese (Simplified) by publishers in the respective countries.
+Mastering Bitcoin (First Edition Second Print) is also published in Japanese, Korean and Chinese (Simplified) by publishers in the respective countries.
 
 Mastering Bitcoin (Open Edition), based on the First Edition has been translated by volunteers into more than a dozen languages. Translations are available for free under CC-BY-SA license on https://bitcoinbook.info
 
@@ -44,9 +44,7 @@ Thank you O'Reilly Media!
 
 ## Mastering Bitcoin - Second Edition
 
-The [second_edition](https://github.com/bitcoinbook/bitcoinbook/tree/second_edition) branch, is the source for the published versions of Mastering Bitcoin (Second Edition).
-
-The tag [second_edition_print_1](https://github.com/bitcoinbook/bitcoinbook/releases/tag/second_edition_print_1), corresponds to the first print of the second edition.
+The tags [second_edition_print_1](https://github.com/bitcoinbook/bitcoinbook/releases/tag/second_edition_print_1) and  [second_edition_print2](https://github.com/bitcoinbook/bitcoinbook/releases/tag/second_edition_print2), correspond to the first (June 8th 2017) and second (July 20th 2017) print of Mastering Bitcoin (Second Edition), as published by O'Reilly Media. 
 
 <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" property="dct:title">Mastering Bitcoin - Second Edition</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="https://antonopoulos.com/" property="cc:attributionName" rel="cc:attributionURL">Andreas M. Antonopoulos LLC</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License</a>.