CSS shaders

[tracend]

The current conventions need to be revised so pixel shaders rely on the syntax of CSS shaders.

This syntax will be supported (through a polyfil) in subsequent versions of jQuery Three: #54

[tracend]

Example uses of the above is the standard VR shader, currently using the OculusRiftEffect:
https://github.com/constructjs/shaders/blob/master/deps/OculusRiftEffect.js

Research:
https://github.com/OculusRiftInAction/OculusRiftInAction/blob/master/examples/webgl/distort.html