update to latest grappelli
updated js from rosetta.
Fixes bad translation id.
Merge pull request #1 from BertrandBordage/master

Fixes bad translation id.
Updates for django-grappelli v2.4
Merge remote-tracking branch 'mtpettyp/grappelli_2_4' into develop

Conflicts:
	rosetta-grappelli/templates/rosetta/pofile.html
Django 1.5-compatible url syntax in templates.