It works more or less the same as lines:

  - particles are passed to ParticleSystem object as geometry
  - material is ParticleBasicMaterial (textures should be supported, not tested yet)
  - geometry can be updated by setting "__dirtyVertices" property of the geometry

Added `boundingBox`, `boundingSphere` and `computeBoundingSphere` to Geometry.

Implemented material blendings (THREE.NormalBlending, THREE.AdditiveBlending, THREE.SubtractiveBlending) in CanvasRenderer
Added MeshNormalMaterial (per face)

* `CanvasRenderer` and `SVGRenderer` basic lighting support (`*ColorStroke`/`*ColorFill` only)
* `Renderer` > `Projector`. `CanvasRenderer`, `SVGRenderer` and `DOMRenderer` do not extend anymore
* Interactivity base code (hdi folder). To be refactored... ([mindlapse](http://github.com/mindlapse))
* Added `computeCentroids` method to `Geometry`
* Included `Stats.js` directly in the `/examples` folder to avoid the need of internet for playing around

* `Particle` now use `ParticleCircleMaterial` instead of `ColorFillMaterial`
* `Particle.size` > `Particle.scale.x` and `Particle.scale.y`
* `SVGRenderer` currently out of sync

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

- Object3D.overdraw = true to enable CanvasRenderer screen space point expansion hack.

- Added (mandatory) video example
- Restructured examples folder

- Added Object3D.autoUpdateMatrix

Added THREE namespace
Camera.x -> Camera.position.x
Camera.target.x -> Camera.target.position.x
ColorMaterial -> ColorFillMaterial
FaceColorMaterial -> FaceColorFillMaterial
Materials are now multipass (use array)
Added ColorStrokeMaterial and FaceColorStrokeMaterial
geometry.faces.a are now indexes instead of links 

Fixed incorrect rotation matrix calculation. Particles examples clean up. Added Cube and Plane primitives. Added Cube geometry example.