Major rewrite of nyaa.js to make the searches use the rss
This lets us compare entries by their seeders and age (which isn't available in a search).
The !nyaa, !nyaan, !nyaall commands no longer return a random entry, but pick one based on number of seeders and age

Plus some other minor stuff like handing PMs.
Merge pull request #23 from HigherFive/nyaa2

Major rewrite of nyaa.js to make the searches use the rss