minor perf increase for updateTransform

got textures binding correctly and webgl works

add backgroundColor to canvas; fix places I forgot to update

fix update transform for DO so it can be root

fix issues with shaders not compiling properly

fix small build/run issues

fix #1055, add clone method to Graphics (untested)

move fastSpriteBatch to renderer; add some docs

remove renderSession code; only pass renderer in ctor

move TextureUvs to textures/

merge #1336, fix typo in convolution filter

merge #1338, fix an issue with tileScale on canvas

Add some docs for source

remove need for global webglRenderers array

add removeView to webgl destroy; default it to false in both renderers

fix #984, null errehthing on webgl renderer destroy

Add dispose method

merge #1334, fix incorrect sin/cos usage

update colorAttribute to be aColor

fix some require paths that changed with some refactoring

fix some jshint issues

merge #1326, add setter and uniform for offset in frag shader

rename shader classes

merge #1313, fix multi-path masks in canvas

merge #1186, implement fixes for video texture in FF

move primitives back into core

Merge branch 'master' into dev

v2.2.3, fix an issue with pixi publish

sync versions in code

Merge branch 'master' into dev