added some buttons to LoginScreen
Merge branch 'feature_game'

Conflicts:
	client/assets/img/smerra/1x/sprite.png
	client/assets/img/smerra/1x/sprite.xml
	client/assets/img/smerra/2x/sprite.png
	client/assets/img/smerra/2x/sprite.xml
	client/src/com/uitsem/birdy/core/Theme.as
setting screen resolution for adl
added Base working GameState
added sound when jumping
added collision detection with gaps and walls
added score display
improved dispose() cleaning
added Back and Start buttons
removed starling stats box