Removed update and destroy webGL functions

Removed the updateFrames global Array

merge in some doc fixes (#967)

Update CanvasRenderer.js

Fix for overwriting falsy values.. or even (possibly) undefined ones.

Merge branch 'dev-retina' into dev ...

Conflicts:
	bin/pixi.dev.js
	bin/pixi.dev.js.map
	bin/pixi.js

few small doc changes

Enable smoothing control for IE11

Added frame clear back in ...

for now..

renderer now uses options parameter

Added Canvas Renderer resolution

Mini Fixes ...

Fixed webGL Blend mode issue
Fixed render texture alpha issue
Fixed Canvas tinting issue

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

Made Pixi log optional ...

Use PIXI.dontSayHello = true before creating a renderer

The roundPixels property in the CanvasRenderer should be a property of the renderSession to be correctly applied in the _renderCanvas methods of the Sprite and SpriteBatch classes.

CocoonJS compatibility fix. Screencanvas cleared before painting.

Docs, examples again, test folder, removeAll func

Merged fillRect and clearRect to single clearBeforeRender boolean.

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).

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

Reset Alpha for CanvasRenderer

Dived into WebGLRenderer, fixes and docs

Typos and Started tackling the WebGL, and tests

Docs :)

Added clear rect to transparent canvas renderer

Fix texture scaling in canvas renderer

Fixed hoever interaciton inconsistency ...

Also changed canvas renderer to use fillRect instead of clearRect as
its faster and works with the new alpha property that canvas has

Fixed scale Issue with text

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