#29 French translation of the GUI (version 0.90.4.00)

[Julien Henry]

As I found the french translation for the 0.90.4.00 version (the version I'm using) was bad (typographic problems, lack of accents, strings not well translated...), I reviewed it. You can find my translation attached. I hope I have respected the requirements for translation files, as indicated on the forum. If you have any problem with the file, please tell me.
As it is the first time I'm interacting with Project-X's community, I want to thank every contributor as I appreciate this wonderful tool very much. :) Thanks a lot to have written it.