Bug 6919 - Follow-up - Implementing XSLTResultsDisplay

Bug 6919 - Follow-up - Implementing XSLTResultsDisplay

- Adding search result numbering to match non-XSLT
  results display.
- Copying author handling (with link to author search) from
  OPAC detail XSL.
- Copying physical description output from OPAC detail XSL.
- Copying ISBN output from OPAC detail XSL.
- Removing availability output (which had been copied from
  the OPAC) because it is redundant in the staff client.
- Removing duplicate inclusion of JS highlight plugin on
  results page.
- Updating highlight JS to make it compatible with XSLT
  results.

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>