closed issue #76, fixed splatfilch.py pylint errors

- AudioDL was responsible for issue #76, making output be 'artist -
  title' without checking what artist was.  added a check to fix this.
- made TitleParse return None instead of empty string when artist not
  found.
- cleaned up various pylint errors that were bothering me in
  splatfilch.py
closes issue #78

easy
Merge branch 'iss76-dash-in-no-artist-songs' into develop
Merge branch 'iss78-feat-vs-ft' into develop