Special case where episodes are not being cleared from database on Local Scan after upgrade

For Mapped Shares we set a Volume Label, in the previous version we did not.

So what happens when we delete a file for an episode that existed in DB prior 
to upgrade? It remains, because we dont clear the episodes that dont have a 
matching volumelabel when they dont exist (in the removable check).

Solution is simple, create an upgrade task which adds a volume label for all 
episodes that dont have one...and also add volume label to all episodes going 
forward including local drives and UNC mapped shares....this also adds the 
benefit of grouping by path.

Original issue reported on code.google.com by damien.haynes@gmail.com on 25 Sep 2010 at 1:01

mwheelerjr / mptvseries

Special case where episodes are not being cleared from database on Local Scan after upgrade #493