jshint fixes

Small fix to reset crop x/y from tinted sprites, also allows us to remove one more temporary var.

Tidied up and optimised Sprite._renderCanvas. Removed lots of temporary vars that weren't needed (texture, crop, frame, transform, child), reduced all the drawImage calls down to just one. Removed redundant baseTexture.hasLoaded check.

Fix to make sure that tinted canvases render with the new trim/crop system.

Implemented the new Canvas render method based on the Texture.crop property. ...

Added some missing properties and jsdocs to the constructor.
Tidied up a bunch of code formatting (to keep it inline with the rest of Pixi).

updateFrame removed ...

Commented out the updateFrame variable from DisplayObjects

Added a valid property to texture ...

Used to check that a texture is good to render

quadraticCurveTo Added to Graphics object ...

Graphics example updated to include quadraticCurveTo

Complex graphics and masking added

Fixed filter bug ...

fixes issue where if both mask and filter are applied to one object the
object did not render.

Fixed a minor typo in Sprite constructor documentation ...

Changed `nex` to `new` and `Sprite.FromImage` to `Sprite.fromImage`

Fixed the 'short cut' version of Math.floor in setTransform if roundPixels is true.

Merge cachAsBitmap Branch

Merge branch 'dev' of https://github.com/GoodBoyDigital/pixi.js into dev

Added cross origin and scaleMode to Sprite.fromImage

Docs, examples again, test folder, removeAll func

Modified trim to be a rectangle instead of point ...

removed trimmed variable on sprite as no longer required
tweaked test to not expect trim to be point

Merge pull request #555 from photonstorm/dev ...

Added PIXI.canvas global object for fill/clear/px rounding

Hoisted the fillRect/canvasRect/pxRound flags to the CanvasRenderer.

Added PIXI.canvas global object which allows for tighter configuration of the canvas renderer. Allows the dev to control if fillRect / clearRect is called (as it's not needed for lots of games and can help perf slightly on legacy devices). Also added PX_ROUND boolean. If true (default is false) it will Math.floor the x/y values on the transform, this stops interpolation when Sprites are rendered at non-pixel values, keeping pixel art crisp. Also helps performance on older mobiles. I removed the view.style.backgroundColor as it was never set, mostly commented-out and is unreliable as hell on Android anyway :( (which I guess is why it had been replaced with the fillRect instead).

Fixes #543 ...

Updated graphics cacheAsBitmap to use getLocalBounds
Tweaks to getLocalBounds
Tweaks to getBounds
removed unnecessary variable declaration in updateTransform

replaced matrix

Fixed, finally adapted to the dev branch

Added cacheAsBitmap to DisplayObject

update scale modes constants

Forgot to update that one!

Fix texture scaling in canvas renderer

Fixed bug in canvas when using masking and blend modes ...

Also removed canvas alpha property temporarily as the new feature needs
to be full tested

Moved Constants to pixi.js file

updated the visible check for display objects