First Retina pass

Sprites / Graphics / Text
Added Resolution property to items

Interactive Manager
BaseTexture
Text
WebGLRenderer
Made sure default resolutions are all 1
Added some new Matrix functions..
Added Canvas Renderer resolution
renderer now uses options parameter
Update SpriteBatch as is somehow became old..
doc update for detector
webGL renderer tidy
republished files
Tweaked interaction manager to include resolution
documented resolution in webGL renderer
Added resolution to Text

resolution will now match the renderer resolution
Added frame clear back in

for now..
linted and published
fixed touch resolution issue
Added resolution param to generateTexture
Fixed Bezier issue on Graphics
Added resolution property to render texture

tweaked docs
Merge branch 'dev-retina' into dev

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