Fix bug with french translation of mister

Abreviation of "mister" = Mr (this is in english) in french it is M or M. for "monsieur"
so if in prestashop you translate Mr to M. like i do, it's correct but, coliposte understand only "Mr"
this is the solution i found 
Merge pull request #22 from elito/patch-3

[-] MO : SoColissimo : Fix bug with french translation of mister