Fix proper searches with ABD and sports
Tidy PP log message
Fix for extensions being stripped off by mistake made when adding in -RP fix from few commits ago.
Moved code for marking failed download successful out of loop.

Newznab providers now create season search strings for all searches as single ep search strings combined with using rage id numbers seems broken currently.
Fix for validating episode data during provider result gathering.
Quality sorting fixed for provider results.

Reverted newznab search strings being confined to just season till we can find a better way of correcting the issue with Usenet Crawler.
Merge pull request #652 from adam111316/fix_airdate_propers

Fix proper searches with ABD and sports
Merge pull request #653 from adam111316/clearer_PP_logs

Tidy PP log message
Fix for sports shows.
Added code to perform disposal of bs4 class when finished as well as perform garbage collection afterwards, this fixed a memory leak issue SR was experiancing during backlog/manual/failed searches.
Further improved memory handling of bs4 for torrent providers.
Fixed sorting provider results by quality code, was causing a error.
Merge remote-tracking branch 'upstream/dev' into dev