French translated strings

[cooolgamer]

Hello, I translated thirdtube's strings in french. Would it be possible to include the french language on the next update? I wanted to create a fork but it's too annoying and will be way better to include it on the official one. The language code is FR and it include a new string <LANG_FR> for it. Here are the strings for the latest version (0.5.2), thanks in advance.

string_resources_fr.txt