Fixing issue #1038

Moving anchor point to translate instead of fillRect. Fix for https://github.com/GoodBoyDigital/pixi.js/issues/1038
Fixing the Graphics class

1. Removed bounds redundancy. this.bounds was removed and replaced with the inherited this._bounds.
2. Added cachedSprite support to Canvas graphics.
3. Added rounded rect to updateBounds.
4. Pushing the updated cached sprite texture to the gpu now.
5. bounds is no longer overwritten with new PIXI.Rectangle classes, instead only the values x,y,width and height get updated.

Fixes the bug that generateTexture is empty. this.bounds was always defined by an empty PIXI.Rectangle. The condition if(!this.bounds)this.updateBounds(); was always false.

Please review my changes. Hopefully no bugs in it.
Fixing the Graphics class // Travis
Fixing the Graphics class // Travis..
Fixed dirty bug, set default resolution for generateTexture to 1
Alternative for text positioning

No more dom required to calculate the font size.
Update Text.js
Merge pull request #1064 from SebastianNette/patch-5

Fixing the Graphics class
Merge pull request #1067 from SebastianNette/patch-6

Alternative for text positioning
Merge pull request #1063 from SebastianNette/patch-4

Fixing issue #1038
Fixed tiny cacheAsBitmap alpha issue for graphics
fixes #1066
republished files
Merge pull request #1068 from photonstorm/dev

Fixed CanvasBuffer @method error other small jsdoc enhancements.
Fixed SpineLoader jsdoc.