Fixed: Skip last write time check on linux for _UNPACK_ folders
Using string for airdate instead of DateTime in models to prevent timezone issues

Fixed: Manual search air by date shows can now be sent to download client
Made NotUnpackingSpec test WindowsOnly
Posting nzbs to SAB instead of sending an URL to download
Storing nzo_id from SAB in history (data)
Failed downloads are added to history
Fixed sab test
Blacklist is now used when processing results
Blacklist check is case insensitive now
Blacklisting will trigger episode search
Fixed broken tests
List<int> will be converted to json and stored in the DB
Added some blacklist tests
Redownload after failure is an advanced option.

New: Handle failed downloads and attempt to find another release (SABnzbd only)
Added message to failed history events
Failed downloads are removed from queue/history (opt out)
Parser can parse absolute episode numbers