Base code by now...

The problem now is that JSONLoader returns geometry/materials. By now I'll ignore the materials but I'll need to think how to solve that eventually.

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.

Updated SceneLoader2 to use latest JSONLoader API. GeometryExported setting bits as 0 as a place holder to start to get things working. Fixes #3198.

Misteriously when using the latest version of the lib on the project I'm working on I'm getting this error:
> Uncaught TypeError: Object [object Object] has no method 'set'
This is caused when THREE.UniformsLib.common.diffuse initialises a THREE.Color (THREE.Color.set() seems to be undefined then).
For some reason this only happens when I load Box2D before three.js. If I load it after is all good. But this fixes the problem too.
/ping @bhouston