Fixed the scripts:

list_users -> it has 10 filters to be able to search different users in the pootle database.
translators_report -> helps creating the translators.html and translators.admin.html
   with the list of assigned/waiting for assignation permissions of the users.
Email templates that are used when sending automatic mails
to the users/coordinators (using cronjobs)
Added a 'User Permissions' link.
Cleaned the translators_report script to generate the transalators.html file.
Added a 'User Permissions' link.
Cleaned the translators_report script to generate the transalators.html file.