Legalese

The Parse.com SDK is CC0 licensed, but we use some other stuff that is Apache licensed. 

So I added attributions to all the third party libraries, and display the Apache license as "terms & conditions". Did I miss anything?

![screenshot_2014-04-28-21-03-53](https://cloud.githubusercontent.com/assets/1841551/2821627/516ab162-cf08-11e3-98de-ff08d81f250a.png)