About page additions

Fix to #227 and then some.
Cited third party libs, added link to our repo, and added a nifty mailto for support. 

There are a few things that need to be cleaned up here - mostly strings in AboutFragment.java. I tried to take care of that before, but I ran into an issue where the repo links stopped working. I'll check it out in the morning with a fresh set of eyes. Let me know if you see anything that I'm missing.

[Here's a screenshot of how the About page looks now](https://f.cloud.github.com/assets/940735/915466/a87abe2c-fe6e-11e2-9db7-5a04085427d2.png), let me know if there's anything you'd like me to change. Note that the links aren't Linkify links so that we could avoid having to rely on the Internet permissions. 

Also keep in mind that this issue is our last bottleneck to uploading beta, so let's try and get this looked at ASAP.

Thanks! :hamburger: