[fix #136] Handle correctly paper role cache

Invalidate the role cache when a user edit role of a paper.
[fix] Add support of not null SyncTeX offset
[fix #135] Manage Firefox password manager

Passwords saved in the Firefox password manager are now correctly filled
in the login form
[fix #138] Change the label of the submit button in paper option page

Change the label of the submit button from 'edit' to 'save'
Improve author and reviewer selection

The enter key is now used to select a user instead of submitting the
form.
Improve translation
[Fix] Update the table of contents with the latest paper version

The table of contents was updated with the paper content of the previous
change. The table of content now uses the latest paper version.
[fix] Fix the foreground color of the connected user list
[add #143] Simplify the creation of a paper

The title filed is autocompleted with the value of the name field.
[fix #139] Not allows ":" in username

Restrict the use of ":" (colon) in the username