PEP8
Don't process files in the TV download directory if they have been modified in the last 60 seconds.

This prevents SB from trying to process files when they are still being
copied (as opposed to being moved which is usually instantaneous) or
unpacked into the TV download directory.

Previously, SB would interrupt the transfer by moving the partial
file to its final destination.
process files by size (smallest first)
Add postProcessor checks: status, quality/filesize, already processed

+ Change search for airdate in database instead of thetvdb
+ Add tv download dir as default manual post-process directory
+ Add is_proper to nameparser
+ Change use quality from snatch history instead of status quality