Added Resources for Romanian

I just added a new resx file, not sure why the csproj diff looks so drastic.

Correctly localizing humanized dates in Romanian is a bit more complicated, and would require changes in the code. The problem is that the template differs for numerals less than 20 and those larger than or equal to 20. For example, "5 days" is "5 zile", while "24 days" is "24 de zile". I'm not sure if other languages have the same characteristic (maybe with different values). I have a vague idea about how one might go about implementing something like that, but I'll need to sit on it a bit. It looks like some kind of locale-based logic would be needed. I'll let you know if I can come with something decent.

Let me know your thoughts.

Thanks,
Victor