Merge pull request #112 from diddledan/master

UIColorPicker fix to select the _correct_ colour.
removed an extraneous log
added the allowTouchBeganWhenMovedOver property to ITouchable for allowing button activation from touchesMoved
added support for 4x textures
fixed bugs with scrollable horizontal containers
enhanced scrollable horizontal containers so they can now have set page sizes, padding and edgeInsets
fixed bug where flicking rapidly on a horizontal scrollable would cause a divide by zero error
fixed Bounce ease
UITextInstance was breaking if you changed the scale and then updated the text. The child text sprites would inherit the UITextInstance scale (which causes them to have the wrong scale).
Now, when you update the text, it first reverts the scale of the UITextInstance to (1,1,z), then updates the text, and finally restores the scale back to the original amount.

This way you can scale UITextInstance via the scale or localScale property, which is more performant than scaling via .textScale (which causes  a complete text redraw).

Also fixed a bug where changing the align mode or vertical align mode if you have a zero length string would cause a crash.
Merge pull request #131 from tayl0r/p31-master

fixed Bounce ease + UITextInstance scaling