Added per-provider option 'backlog only' which allows you to disclude any provider from the daily search but still use it for backlogs, currently working for torrents only and will add to nzb providers later on today.

Cleaned up details on search options for providers and made it look nicer
Fixes issue with daily searcher setting episodes past todays date to wanted.
Fixes issues with episodes that have been set to a WANTED status but have a airdate in the future past current date.

Fixes issues with daily search so it only searches for shows between 1 week ago and current date.
Corrected a sqlite syntax error
Fix to ensure unaired fix for mainDB only happens for shows without a already set UNAIRED status