Add links to terms and privacy policy to footer

https://trello.com/c/kvHopRjz

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Desktop Screenshot:
![screen shot 2014-08-16 at 3 29 27 pm](https://cloud.githubusercontent.com/assets/1174461/3943273/f056c738-2594-11e4-901b-e894e184bec6.png)

Mobile Screenshot:
![screen shot 2014-08-16 at 3 30 01 pm](https://cloud.githubusercontent.com/assets/1174461/3943274/f8588804-2594-11e4-9c9e-02548e98aac1.png)
While you're here, can you change this to "open source software" instead of "free software" to avoid confusion about the price?