remove material.ambient from everything per discussion here: https://github.com/mrdoob/three.js/pull/5741#issuecomment-67893202

Also nicer whitespace formatting for lights and cameras in strings generated by SceneExporter.

Bumped scene format version to 3.2

Modified correspondingly SceneLoader, SceneExporter, Blender scene exporter and example scene files.

See #2628

Not there yet completely, some things are still broken and code is pretty horrible but at least something starts to work.

And menubar hover thingies are back ;)

See discussion in https://github.com/alteredq/three.js/commit/fe902e553f5e30e3752398ad1588bcc4ea1f5513

For the moment just clear color is plugged in.

This is going to be tricky for models loaded as full scenes like Collada or OBJ (though there first we will need to figure out how to handle these at all in scene format / SceneLoader).

For the moment just with material parameters which are exposed via UI.

Very much work-in-progress. This is going to take a while. Besides export being tedious by itself, I keep finding many things elsewhere in the codebase that need to be changed or fixed for something like this to work at all.