OverDrive Extract Fix
- Extract publication date correctly so we only get the year in the metadata table (which is whwat we need for indexing)
Remove sorting by title after sorting by relevance because that breaks the site
Nashville Go Live fixes
- Correctly index publication Date and popularity for OverDrive Titles
Merge branch '2013.06.0-Nashville' of git@github.com:mdnoble73/VuFind-Plus.git into 2013.06.0-Nashville