Merge pull request #54 from Joschasa/master

translated the 3 new strings to german
Update README.md
refactor documentation
Update README.md
Merge remote-tracking branch 'origin/master'
Update README.md
update to 1.2.3, modify changelog
new proguard
remove unnecessary anchor tag
Merge remote-tracking branch 'origin/master'
Update README.md
ensure that the 'enter player names' screen isn't shown when the back button is pressed, if the game has been modified
update to 1.2.4, fixes #57
ensure any non-empty game, when back is pressed, leads back to the main screen - fixes #58
whitespace and logging changes
ensure that the textview is not set to invisible if the animation was canceled.  something appears to have changed in Android concurrency between versions to cause this bug (seeing it in jellybean).  Fixes #60.
update version, new proguard
fixes #64, actually seems to be an issue with devices lacking an SD card
update version
experimentation with player colors