Adds yoda resource

I think, a tool like FOAAS sorely needs a Star Wars-related option. I could not find one, that's why i created this pull request.

This commit adds a new resource /yoda/:name/:from that will return a response like

'Fuck off, you must, Darth_Vader. Yeesssssss.
- Yoda'

when called as /yoda/Darth_Vader/Yoda .