Add plugin for trakt.tv RSS feed.

Trakt.tv can be used to track watched tv shows and movies.  This plugin pulls from a VIP members RSS feed to save watched items in Day One.
No time zone support needed.

What I thought was a bug in the trakt feed was a misunderstanding.  On a check-in they put the time that a person would finish watching a show in the feed:  current time + length of show.  If you want the feed to reflect the time you started the show, mark it as "previously watched".
Merge pull request #184 from scrooks/trakt

Add plugin for trakt.tv RSS feed.