added helper for youtube. cleans up the url so that situations like:

        * http://youtube.com/watch?v=XFMrBldVk0s
        * http://youtube.com/watch?v=XFMrBldVk0s&feature=blahblah
        * http://youtu.be/XFMrBldVk0s

all map to the same db entry
Merge branch 'master' of https://github.com/jeffmahoney/vishnu
added vim .swp files and cookie.jar to the ignore list
Merge pull request #3 from grahams/master

First pass at a youtube url helper...