Also moved some more ui.js styles to the app's css.

I tried to replace the box.js with CubeGeometry but I guess material.side is still not implemented.

WebGLDeferredRenderer: made attenuation parameters properties of AreaLight instead of hardcoded constants.

Up vector can go outside of the shader. Attenuation can be computed only for lit pixels.

Also removed magic 1.5 constant in diffuse term.

Using original ArKano22's way:

http://www.gamedev.net/topic/552315-glsl-area-light-implementation/

Also added forgotten AreaLight.js

Moved computation of view space position, normal and right vectors out of shader into JS and passing them as per-light uniforms.

To be continued ...

todo:
- optimize vectors that don't need to be computed in shaders
- use material albedo
- add specular term
- wrapAround lighting (if possible)
- make attenuation parameters uniforms or defines instead of hardcoding them
- this is not using surface normal anywhere, this can't be right?
- maybe some box proxy instead of full-screen quad

See #2624

See #2803

And this should be it. Probably our longest standing bug. Relief ;)

It seems the mystery that was puzzling us for years were quaternion indices (Blender's wxyz vs ours xyzw which wasn't noticeable when using numerical indices).

Local rotations now already ok, still need to deal with global scene rotation.

See #2803

remove duplicate Quaternion.toEuler (already on Vector3.setEulerFromQuaternion), expand Quat unit test, fix merge.

Conflicts:
	test/sources.html

add new credits to Quaternion.js, expand Quaternion unit tests, move Matrix4 set* methods to standard file location.

Also more shader refactoring and unifications across light types.