Adds preferred callnumber, library and location to SMS

Closes #901 

```
Sent mail to 1112223333@txt.att.net (12.5ms)
Date: Tue, 16 Sep 2014 12:12:50 -0700
From: no-reply@xxx.xxx.xxx
To: 1112223333@txt.att.net
Message-ID: <xxx@xxx.xxx.mail>
Subject:
Mime-Version: 1.0
Content-Type: text/plain;
 charset=UTF-8
Content-Transfer-Encoding: 7bit

Campbell Biology
BIOLOGY - STACKS
QH308.2 .C34 2011
http://localhost:3000/view/9052324
```
This returns the library and location code (e.g. GREEN, BIOLOGY, STACKS).  We need to return the configured name (e.g. Green Library, Biology Library, Stacks).

This can be accomplished by instantiating the library/location class on the code from the call number and then calling `#name` on it.