The TOP Contributors are only visualizable by the admins.
This should be actually a Pootle General option to turn on/off.
Added Extra & Filters tab in the Administrator tabs.

The extra tab will contain reports like:

User Preferences
Users waiting for permissions approval
Users waiting for permissions removal
Projects 100% completed

The filter tab will be able to filter some specific users and send them emails.
The actions in the category 'TranslateOffline' will be only visible by users with 'administrate' permissions.
Now only superusers can see the Translate Offline actions.
Also hidden the 'Manage' actions. Only show for superusers.
Added the EXTRA tab urls.py
Updated TODO/CHANGES file
Renamed 30-site.conf to 30-site-local.conf