Blender Git Loki

Added user interface to OBJ import.
With options.
('Material (*.mtl)', IMPORT_MTL, 'Imports material settings and images from the obj's .mtl file'),
('All *.obj's in dir', IMPORT_DIR, 'Import all obj files in this dir (avoid overlapping data with "Create scene")'),
('Create scene', IMPORT_NEW_SCENE, 'Imports each obj into its own scene, named from the file'),
'Geometry...',
('Edges', IMPORT_EDGES, 'Import faces with 2 verts as in edge'),
('Smooths all faces', IMPORT_SMOOTH_ALL, 'Smooth all faces even if they are not in a smoothing group'),