LP#1424815: 'Read more' accordion in record view

LP#1424815: 'Read more' accordion in record view

First part to add an optional 'read more' clicky to long fields in the
record view.  CSS-based, no javascript involved.

Signed-off-by: Jake Litrell <jake@greanvine.com>
Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Conflicts:
	Open-ILS/src/templates/opac/css/style.css.tt2

Conflicts:
	Open-ILS/src/perlmods/lib/OpenILS/WWW/EGCatLoader/Util.pm
	Open-ILS/src/templates/opac/css/style.css.tt2

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Remington Steed <rjs7@calvin.edu>
Conflicts:
	Open-ILS/src/templates/opac/parts/record/contents.tt2