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

run jshint in default task

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

update builds

sync versions in code

Merge branch 'master' into dev

Fix typo in fromImage logic ...

This bug was introduced in 1a96f90

hotfix v2.2.1

Fix #1324, update TilingSprite Texture correctly.

merge #1192, allow filters to go 'offscreen'

merge #1265, change manager to act on generic DOM

merge #1274, add error listeners to some loaders

merge #760, allow movieclip to loop either direction

minor tweaks to shader attrs