side is not created anymore, just as the back/front filling faces are not created when disabled.
when both are off the behavior is unchanged.
This is needed when rendering alpha text so its possible to have a single layer of faces but use the bevel option to make text thicker.
adding a rim on the back when back is disabled also doesnt make much sense IMHO.
minor python edits too.
since this isnt a module its self its a little odd to do this but toctree cant make arbitrary cross-references.
Also added some usage examples: http://www.blender.org/documentation/250PythonDoc/bpy.data.html
