Merge pull request #58 from msavazzi/1.3.0.x

Fixed bug in delete poster/fanart
fixed: season fanart can't change...

... if episodes are not in a separate season folder
fixed: YAMJ season fanart in edit window
fixed: deletion of posters and fanarts

- all known posters and fanart filenames are now deleted properly.
- <movie>-fanart.jpg for YAMJ is now saved correctly
Merge pull request #59 from msavazzi/1.3.0.x

1.3.0.x
fixed: AllSeasonPoster can be deleted
fixed: missing filenames when deleting
Merge remote-tracking branch 'upstream/1.3.0.x' into 1.3.0.x