allow dashes in youtube ids
detect youtube ids in urls like this "http://www.youtube.com/watch?feature=player_detailpage&v=UBqDWfLcYy0"
only include non-null memberitems
only call something a relevant alias if we can get a youtube_id out of the url
catch bad youtube input better
catch an error better to /importer POST
Merge branch 'master' into toptweets, with importing of blog posts and tweets commented out

Conflicts:
	totalimpact/providers/wordpresscom.py
	totalimpact/views.py