RNA Types metaclass registration

See mailing list posts for details [1][2][3]

Addons still need to be fixed; Campbell said he'd do it today.

See any of the py files (outside netrender) in this commit for how to do it (it's rather simple).

[1] http://lists.blender.org/pipermail/bf-committers/2010-February/026328.html
[2] http://lists.blender.org/pipermail/bf-committers/2010-August/028311.html
[3] http://lists.blender.org/pipermail/bf-committers/2010-August/028321.html

release/scripts/io/export_obj.py

@@ -970,11 +970,9 @@ def menu_func(self, context):
 
 
 def register():
-    bpy.types.register(ExportOBJ)
     bpy.types.INFO_MT_file_export.append(menu_func)
 
 def unregister():
-    bpy.types.unregister(ExportOBJ)
     bpy.types.INFO_MT_file_export.remove(menu_func)