Slight corrections/improvments with French (#685)
Slight corrections/improvments with French (#685)

- `comment_success_msg` : Just corrected a missing `m` in *commentaire*
- `related_label` : Added `aussi` (*as well*) in the end of the sentence to make it more "natural" French
-`less_than` : `plus petit que` wasn't right, in this precise context, this form is more about the mathematical character `<`. `moins de` is one of the exact use in this particular case (talking about duration) --- *Less than one minute* == `Moins de 1 minute`
- `follow_label` : Using `Contact` in place of `Suivez moi` make it less personal, and so, better suited for most cases (`Suivez moi` is more like `Follow me`)
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