view: fix rare crash when connecting
stats: add Google+ signin / signout and basic leaderboard
stats: add achievements button, second leaderboard
google+: signin/out in preferences, hide achievements, proper localizations

only show one leaderboard for now
integrate BaseGameUtils into project, remove dependency to outside project
refactoring: add scores to db in FreebloksActivity, add scores to GamesClient as well
preferences, statistics: properly remove Google+ controls when Play Services are unavailable
game menu: dialog has more width to hopefully fit all localizations
version 0.2.5
game finish: implement some basic achievements
finish: add achievements to FinishActivity

shows toast in right window
preferences, stats: show achievements button
add achievements entry to finish, preferences and statistics
Merge branch 'master' into vip

Conflicts:
	AndroidManifest.xml
	src/de/saschahlusiak/freebloks/game/FreebloksActivity.java
	src/de/saschahlusiak/freebloks/game/GameFinishActivity.java
	src/de/saschahlusiak/freebloks/stats/StatisticsActivity.java