Added a settings activity

The Icon needs to be edited, but it works.
![settings_0](https://cloud.githubusercontent.com/assets/5498618/2896851/006ca302-d574-11e3-9b41-1d28a210bf35.png)
![settings_1](https://cloud.githubusercontent.com/assets/5498618/2896852/16bddb30-d574-11e3-8ae9-582ef8fcddf3.png)