Create Ruby 2.0 News

Hi @andorchen,

due to the reason that you are native I just send you my try of translating the latest news. So that the chinese site looks a little bit more up-to-date. I think specially the news for Ruby 2.0 is quite important. I just send you the pull request and I hope you have time to fix the bad translation (-; Afterwards just send it to the official site if you are fine with it. Ok?

Regards
Daniel