Changed mesh JS class name generator in Blender exporter to use cross-platform path parsing.
Old version was generating broken class names on Windows (full path was included).

* Updated TODO

* Added Blender 2.54 exporter. (Crossing fingers so they don't change the scripting system again...)

* `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

Using projection * view * obj matrix to transform vertices in Renderer instead of transforming twice (once by view * obj and once by projection).

  * Added getCenter to Face4

- Minor tweaks

 * Bug Fix: Matrix4.makeInvert was calling a non existent scale method. Replaced with multiplyScalar.
 * Bug Fix: DirectionalLight wasn't normalizing the direction vector.
 * Added lights to the scene for test.html

 * Add lighting code in the scene rendering loop

 * Added float precision in shader code to shaders compile now.
 * Changed occurrences of WebGL typed Arrays and UnsignedShort typed arrays to new array types

* Additional `Matrix4` and `Vector3` methods

- Camelcased the minified files (it feels weird both ways anyway...)

- Face4 with MeshBitmapMaterial gap fixed