Added youtube sync support

Youtube now syncs through a management command. links playlists
via a meetup url in the video summary. user rss feed. url stored
in settings.py

removed old method of looking up videos at runtime

added service sync model to app to keep track of last successful
service sync.
Merge branch 'master' into youtube
fixed aws level; fixed file upload on vagrant
Merge branch 'master' into youtube
Merge pull request #71 from dgreisen/youtube

Youtube via RSS