Grouping and OverDrive Updates

OverDrive
- Load Subtitle from OverDrive into the database
- Additional error checking

Record Grouping
- Fixes to abbreviation correction (use for author and title)
- Optimize stripping non-alphanumerics
- Group other formats separately from books, movies, and music
- Handle subtitle for overdrive titles
- Use sections when grouping seasons (so season 2 is different than
season 1)
- Add additional authors (110, 245c, 260, 710)