Localize the addon in chinese

[Pierre-Sassoulas]

Following a request in #9, we could localize the addon for Chinese users. I don't know any Chinese so the translation would be really bad unless I'm helped by someone knowledgeable.

[swetlover]

Please give the English content that needs to be translated.

[Pierre-Sassoulas]

Thank a lot for your help. there is a lot of things to do in the code first. I'm going to try to localize in french first and once it's working properly we can add Chinese too :)

[Pierre-Sassoulas]

@swetlover, I can change some strings if the way it's done makes it impossible or hard to translate. for you :)
For example: " (your stack overflow by " could be transformed to " (your stack overflow by %s)" in order for the number to be able to be anywhere in the translation. It was not a problem in french because it's very close to Englishn but it could be in chinese, I don't know.