adds mailer and feedback form functionality

Fixes #37 

Adds feedback form functionality to application with test suites. I am scoping out the quick book report button to another ticket as it may depend on #78 

One issue is that the html rendering of the flash is not rendering html tags correctly.  Any suggestions? `html_safe` does not seem to work.

![screen shot 2014-05-22 at 2 26 00 pm](https://cloud.githubusercontent.com/assets/1656824/3060494/67a2e99c-e1f8-11e3-9a57-3bf8bb95554a.png)

![screen shot 2014-05-22 at 2 26 13 pm](https://cloud.githubusercontent.com/assets/1656824/3060499/6ba2e59c-e1f8-11e3-942a-35e94bf68207.png)

![screen shot 2014-05-22 at 2 26 28 pm](https://cloud.githubusercontent.com/assets/1656824/3060502/77437d80-e1f8-11e3-9194-802f0ddb4177.png)

![screen shot 2014-05-22 at 2 26 41 pm](https://cloud.githubusercontent.com/assets/1656824/3060505/7d1a8636-e1f8-11e3-8198-b557a4fa6aeb.png)