Create calendar_lang.php
Create date_lang.php
Create db_lang.php
Create email_lang.php
Create form_validation_lang.php
Create ftp_lang.php
Create imglib_lang.php
Create migration_lang.php

Not sure that "sauvegarde" is the appropriate word so fell free to remplace it...
Create number_lang.php
Create profiler_lang.php
Create unit_test_lang.php

Some datatypes traduced above sound weird, fell free to replace it.
Create upload_lang.php
Update email_lang.php
Create index.html
Merge pull request #20 from nhoway/master

French Translation