French translation

This is a file that will translate the LoginToboggan module admin interface AND user interface in french.

This works for 4.6 except for a single line 'change the drupal path's' which was not included in the .pot template?

Otherwhise it works, and the translation is pretty good. Of course comments and modifications can be done if the language use does not suits you.

Whoohoo my first contribution ;)