Ensure file is not fetched if it already exists on disk
Allow batch downloads to use same nice file format as GUI
fixup flow of GUI style filenames will fallback
fix changed var name
show filename that we are saving to
Factor out iview.fetch.descriptive_filename() function
Revert "Ensure file is not fetched if it already exists on disk.  Change default filename for batch downloads so that the filename is more descriptive, including series and episode numbers as well as the Series/Episode name."

This reverts commit 02880542f1b095107784193b49b38a10dfd4143c.
Merge commit '8bf7930227927e58586bfc90829c21cc4514de94'
Rework Regex-based series/episode parsing.  For reference, aiming for filenames conforming to one of the following for Sickbeard compatibility: https://github.com/midgetspy/Sick-Beard/blob/development/sickbeard/name_parser/regexes.py