Fix mixed line endings
Change 90 days update: update only 10 oldest stale shows per session

Distribute the updates of real 'Ended' shows in smaller portions,
prevent hitting thetvdb with all stale 'Ended' in one update session.

+ moved should_update to TVShow object
+ use same update_date variable during session
+ changed some variable names
Fix unnecessary message about PID file creation
Change omgwtfnzb search url (301 Moved Permanently)
Merge branch 'change_90_days_update_dev' into development