Patch from Lebbeous Fogle-Weekley which implements the configuration interfaces required

Patch from Lebbeous Fogle-Weekley which implements the configuration interfaces required
to support bookable resources, including the addition of cataloged materials as bookable
items.  Thus spake Lebbeous:

Here it is at last.  The only entry point (for now) to these interfaces
besides the "admin" menu is in the holdings maintenance / copy browser
context menu.  There you can select items and create bookable resources
out of them (basically), and upon that creation you get a new tab open
in the staff client where you could further edit (in a basic, conify
way) that resource.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@15077 dcc99617-32d9-48b4-a31d-7c20da2025e4