Nashville: new css styles files
Nashville: MyResearch checkedout formatting, OPAC test configuration in header and footer
Nashville: add custom EcontentRecord/viewholdings.tpl
Merge branch '2013.06.0-Nashville' of https://github.com/mdnoble73/VuFind-Plus into 2013.06.0-Nashville
Nashville: incorporate number of holds into popularity to boost bibs with no items