Add dependent: destroy for favorites on Anime and Manga models

Forum Issue: http://forums.hummingbird.me/t/thread/12670
Fixed incorrect First Impressions label for reviews section on entries without a finish date
Fix quick update reflow on loading.
Handle short youtube links in message formatter.
Merge pull request #172 from nashby/youtube-link

Handle short youtube links in message formatter.
Merge pull request #168 from NuckChorris/dependent-destroy-favorites

Fix destruction of favorites when media is deleted
Use proper website href if there is no protocol specified.
Merge pull request #171 from btf064/master

Fixed incorrect First Impressions label for reviews section on entries without a finish date
Merge pull request #174 from nashby/user-website

Use proper website href if there is no protocol specified.
Add generic preloader.
Add static broadcast system to header
Merge pull request #175 from NuckChorris/static-broadcast

Add temporary static broadcast message telling users to clear cache
Use PreloadStore for broadcast message.