Improve the French translation
[fix #127] Improve English translation
Informs user that password is sent by email.

Add a message before registration to inform user that password is sent
by email.
Merge pull request #129 from tdurieux/translation-improve

Improve French and English translation
Merge pull request #130 from tdurieux/mailbox-check-registration

Informs user that password is sent by email.
Fix minor bugs
Configure Javascript unit tests
Test application start
Test latex service
Test synctex parser