- Fixed overdraw when using stroke materials

* Removed SVG rgba() workaround for WebKit. (WebKit now supports it);

- Added terrain demo.

- Added video example link

- Added (mandatory) video example
- Restructured examples folder

- Added wireframe view on VR demo

+ Expand UVs (this should fix the glitches)

- CanvasRenderer supports TextureUVMappingMaterial.
- Moved UVs to Geometry.
- Minor clean up

- Added Object3D.autoUpdateMatrix

+ Workaround for WebKit not supporting rgba() in SVG yet
+ Aesthetic changes on the readme file

CanvasRenderer: Min of ClearRect with ClipRect

clearRect optimisations on CanvasRenderer

Vector3.cross -> crossSelf
added Vector3.multiplySelf and others (kile)

Example was still using ColorMaterial