Changed lookAt() functions so they don't overwrite the object matrix. Added quaternion support to Object3D.applyMatrix()

Multiple objects can have the same id. Using that id to compare the render
objects makes the sort function unstable. Use the webgl object's index in the
render list instead. That number is guaranteed to be unique.

This fixes #2966.

Wireframe objects were being dashed depending on the order.

remote flyweight pattern in ColorConverter.toHSV per @zz85's suggestion here: https://github.com/mrdoob/three.js/pull/3109#issuecomment-13923276

update style based on @mrdoob's suggestion here: https://github.com/mrdoob/three.js/pull/3109#issuecomment-13915971

Made CanvasRenderer and SVGRenderer behave like WebGLRenderer with MeshLambertMaterial and no lights.

WebGLRenderer needs some internal refactoring.