Bug 10562: Improve Leader06 Type Labels in MARC21slim2OPACResults.xsl

Bug 10562: Improve Leader06 Type Labels in MARC21slim2OPACResults.xsl

This patch takes the suggestions in Bug 10562 and implements those
changes in MARC21slim2OPACResults.xsl. This patch also makes the
following changes:

 - De-duplicate famfamfam icons: Remove the /silk subdirectory and move
   non-duplicates to famfamfam/; Correct paths to these images in
   templates and CSS
 - Improve the granularity of some material type icon choices: Show
   "Film," "Picture," or "Object" instead of "Visual material."
 - Remove unnecessary title attributes from material type images
 - Implement the kind of changes made in Bug 18235, "Add classes to
   material type icons on result lists and detail pages"

Signed-off-by: Charles Farmer <charles.farmer@inLibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>