Add ability to skip notices (snatched/download) per show. PEP8 fixes as well.
Useful for those that fetch shows for their significant others that don't care to get the notification noise. Or if they know they are about get a bunch of notices (backloging a show/season rips) they can quickly turn the notifications off for that show.
Merge pull request #867 from thezoggy/dev--exclude_notification

exclude notification