bell.png and bell_bw.png derived from:
http://www.iconfinder.com/icondetails/1227/128/alarm_bell_icon
GLPL

holdshelf.png, reserve.png and transit.png were created by Christine Morgan
at the North Of Boston Library Exchange. Copyright © 2016 North of Boston
Library Exchange, all rights reserved. Permission is granted to copy, distribute
and/or modify this document under the terms of the GNU Free Documentation
License, Version 1.2 or any later version published by the Free Software
Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
Texts. A copy of the license is included in the section entitled "GNU Free
Documentation License".
