Fix disposing font. Read more after the break...

Update the Android SDK Tools rev. 22, Platform-tools rev. 17,
Build-tools rev.17.
Otherwise you'll get errors checking this commit and all new updates.
In your Android project check "Android Private Libraries" at Order and
Export.

FlxG
Removed _cache.disposeAssets(..) at clearBitmapCache().
playMusic(). Somehow the phones are to slow to determine the length of
the music file and it choose for Sound instead of music.

FlxBox2D
I've been refactoring stuff to one place, mostly at B2FlxB.
Now you can let the world and bodies survive on state change. However
this won't work with joints, because Joints doesn't have userData
(commented out by libgdx).