Bug 13771: Add admin help files for 3.18

Bug 13771: Add admin help files for 3.18

This patch adds a new help file for column settings and updates the
files for budgets, funds, libraries, patron categories, and circ rules.

To test:

* Visit the above listed admin pages
* Review help files

Signed-off-by: Jesse Maseto <jesse@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 15dd5e99432450597b3b29f975b1ad8c5c6ffdc1)
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>