Removed some more clearColor stuff from editor and SceneExporter.
Started SceneExporter2.
SceneExporter2: Added some basic type checking and hierarchy.
Added Vector*.toArray(). Implemented in SceneExporter2.
Vector4: Moved around the new methods to keep the end structure like in Vector2/3.
SceneExporter2: Added camera and light parameters.
Doc additions

Remove redundant normalize() in Vector3.html (there were two). Other
additions.
Merge branch 'master' of https://github.com/erich666/three.js into dev
Merge branch 'dev' of git://github.com/mrdoob/three.js into dev