Fixed TilingSprite not render children on canvas

TilingSprite does not render children on 2d canvas. The call to
children's renderCanvas method is missing.
Fix Text.destroy() and fix memory leak in BaseTexture.destroy() if basetexture was from canvas
Implemented animationSpeed for Spine animations.
Default value is 1.
This is simply the "timeScale" value from the Spine runtime, but with a more friendly name.
Add scaleMode params to FilterTexture and RenderTexture
Tweaked CacheAsBitmapExample

fixed anchor point issue with cacheAsBitmap
Fixed texture loading on IE11
Fixed Data URI loading
Better solution for Data URI crossorigin
Merge pull request #680 from ekelokorpi/dev

Fixed texture loading on IE11
Added multitouch support
Changed touchDatas to touchData
Correct boundsPadding documentation. Fixes #687

Two properties were incorrectly called "bounds" under Graphics'
documentation.
Merge pull request #688 from iirelu/doc-fix-1

Correct Graphics().boundsPadding documentation
Removed the trailing whitespace when wordwrapping a textfield
Fixed undefined __touchData
Merge pull request #681 from ekelokorpi/dev

Added multitouch support
Fixed issue with masking not working with renderTextures / Filters

Masking for everyone, everywhere!
Removed this.local in InteractionData fixes #654
Merge pull request #695 from mowday/dev

Removed the trailing whitespace when wordwrapping a textfield
Tidied up json loader

Set ajaxRequest to be asynchronous
Added an error even back in