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

Fix typo in fromImage logic ...

This bug was introduced in 1a96f90

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

merge #911, remove some unused vars

merge #969, fix a logic error in spine impl