* Workaround for Opera bug (clearRect not working with context with n…

…egative scale)

* Additional `Matrix4` and `Vector3` methods

- ParticleBitmapMaterial.offset clearRect fixed

- Face4 with MeshBitmapMaterial gap fixed

- Added Mesh.flipSided boolean

- Blender Exporter: Using filename instead of object name for classna…

…me (easier to use that way)

- First version of the WebGLRenderer (ColorFillMaterial and FaceColor…

…FillMaterial by now)

- Matrix4.lookAt fix (CanvasRenderer and SVGRenderer now handle the -Y)
- Color class now using 0-1 floats instead of 0-255 integers

- Scene.add > Scene.addObject

- Enabled Scene.removeObject
- Removed computeNormals() from Geometry

- Removed unneded updateMatrix in Camera

- Simplified lookAt in Matrix4
- Added cross() in Vector3

- Fixed matrix bug (transformed objects outside the x axis would get …

…infinitely tall :S)

- Fixed overdraw when using stroke materials

+ TextureUVMappingMaterial > BitmapUVMappingMaterial

+ Expand UVs (this should fix the glitches)

- Wrong syntax for link in README