MALstats v0.73

Mostly small fixes
Entering in a username empties the text field so people can add multiple people to the database more quickly
Hopefully fixed an issue where shows were getting hipster scores above 100%
Changed the criteria for updating a show in the database (Focused towards airing shows where lots of info can change), should work now.
New stat for global and groups shows the drop % for a show.
My current solution for optimising the timeline is to have it all computed when the user is processed through the queue, store the info in a new database, and just have it read when needed. Adds a few seconds to queue processing but that doesn't matter since it loads instantly now for users every time.