Extended Duplicate Options 1.2.0 for Maya (maya script)

update on 1.2:
- the new version of Maya make the ui build failed

update on 1.1:
- a bug on Maya 8.0: the help was removed

update on 1.0:

- the "Enable Extended Duplicate Options" is now on the top of the options window.
- the "Total Transform duplicate mode" is now avaible.
- the scene can now be saved, opened and keep the attributes update working.
- the scene can now be rendered with animation.
- the customs attributes for the constraints are now reported on the parent group.