Switch to using open-uri for loading images
Set SOURCE for Brightcove loader
Hard-code KPCC for Brightcove video owner
Move some code into Video base class
Add spec for Brightcove loader
Fix flickr spec
Test that the image gets set in youtube loader
Remove brightcove controller/views
Add Vimeo support
Better asset preview handling
Add header to url input
Auto-load Brightcove videos
Better notes for Brightcove imports