Made CanvasRenderer ParticleBasicMaterial handling consistent with the rest — material.map needs to be a Texture.

Also shader program building is now spread over loading time.

Creating all GPU stuff when rendering the first frame doesn't work well with gated initialization :(.

Also made car prettier and showed how to modify the scene after loading.

This is very much work in progress - expect things to change and to be broken.

https://github.com/mrdoob/three.js/pull/97

* memory and speed optimizations in Matrix4.makeInvert3x3() (moved Matrix4.m33 to WebGLRenderer._m33 since it is
  only used there and only for a single Matrix4)

created _m33 class member (moved out of Matrix4) and modified THREE.Matrix4.makeInvert3x3() call accordingly, as with WebGLRenderer

created _m33 class member (moved out of Matrix4) and modified THREE.Matrix4.makeInvert3x3() call accordingly

* memory and speed optimizations in Matrix4.makeInvert3x3() (moved Matrix4.m33 to WebGLRenderer._m33 since it is
  only used there and only for a single Matrix4)

Optimized Object3D.updateMatrix to (1) cut down where possible on new Matrix4 allocation, (2) only compute
rotation/scale matrices if needed (if no rotation, no need t compute); and (3) no longer require
storage of translationMatrix or scaleMatrix (1 per object). Uses a single tmpMatrix instead.

added Matrix4 "setter" functions: setTranslation, setScale, setRotX, setRotY, setRotZ, setRotAxis; to be used in optimizing Object3D.updateMatrix.

slight speedup in Matrix4.rotationAngleAxisMatrix by cutting down object lookups and redundant multiplications