Gilad/new courses img

### flat design courses png!
 <i>ooh, pretty.</i> :smile: :cake: :leaves: :mailbox: 

@danrschlosser 

![screen shot 2014-09-11 at 5 28 09 pm](https://cloud.githubusercontent.com/assets/1843466/4242117/b250342c-39fa-11e4-9a63-1b3856e06d3f.png)