Fixed app lockup caused by improper handling of TheTVDB errors during image lookups when resource not found.
Re-enabled provider url grabbing from SR API, remove all calls to urls method from __init__ methods of provider classes.
Removed scene name cache, added function to search show cache by terms to retrieve series ID.
Refactored scene exception functions.
Added scheduler job to update scene exceptions once a day.
Tightened up display show view.