Improved subject formatting on summary page, and better title bookmarking

Improved subject formatting on summary page, and better title bookmarking

Apply a modified version of Ben Ostrowsky's patch from
https://bugs.launchpad.net/evergreen/+bug/627133 - the modifications include
using BT.textContent() to retrieve the text of the subfields, and
getAttribute() instead of dojo.attr() for IE support.

From the description of 627133:

Currently the BibTemplate code in rdetail/rdetail_summary.xml for display
of subject headings only includes the 650. It should be expanded to:

  * include all standard subject added entry fields (or more broadly, all 6XX)
  * exclude control subfields (those whose subfield label is a digit) from display
  * only using the double-dash separator before subfields $x, $y, $z, and $v.
    The display text of other subfields should be separated from one another only
    by a space.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@18456 dcc99617-32d9-48b4-a31d-7c20da2025e4