texture map support. force PoT images
Merge branch 'doubleup-texture'

Conflicts:
	doubleup-android/assets/game.xml
	doubleup-android/assets/img/flags/EN_US.png
	doubleup-android/assets/img/framework/close.png
	doubleup-android/assets/img/icon.png
	doubleup-android/assets/img/logo.png
	doubleup-android/assets/img/reset.png
	doubleup-android/assets/img/toolbar/back.png
	doubleup-android/assets/img/toolbar/sound-off.png
	doubleup-android/assets/img/toolbar/sound-on.png