Fix bug in StateManager where a state's update function might not get called if it has an empty preload function
make tweens chainable with .to

Allow successive .to calls to chain tweens, and an example using it.
Fix box dimensions in PIXI.BitmapText. Support anchor in Phaser.BitmapText
Fix box dimensions in PIXI.BitmapText. Support anchor in Phaser.BitmapText
make tweens chain loopable
Alternative way to specify tile size in spritesheets: negative means how many tiles there are
Fixes to math library
Merge pull request #61 from powerfear/master

make tweens chainable with .to
Merge pull request #60 from TheJare/master

Fix bug in StateManager...
Merge pull request #62 from TheJare/fixbmtext

BitmapText fixes
Graphics fixes and other changes
1.0.6a
Group length checks
1.0.6 release to fix a few important issues and prepare for the dev branch.
1.0.6a release to fix an issue in the StateManager.
Fixed bug in LinkedList#remove that could cause first/tail to be have pointers to removed nodes