add_extra_mesh_objects: new version

Tracker: https://developer.blender.org/T44561

New UI, New Addons, Better organization & removal of 'Lesser Object
Types'

Merged & removed "lesser" & 'larger" add mesh scripts.
Menu updates & re-organization & modernize.
New: Add Vert, Round Cube, Menger Cube, Brilliant Diamond, Parent to
Empty
Removed: Add Mesh: Sqorus, Trapezohedron, Wedge, Polysphere.
Merged add_mesh_symmetrical_empty from contrib
Documentation:
http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Add_Mesh/Add_Mesh_Extra_Objects