Progressive header.jpg

The header.jpg was taking so long to load (yep, unfortunately I have a slow connection).

![screen shot 2014-12-04 at 11 53 03 pm](https://cloud.githubusercontent.com/assets/1909761/5309827/010ce24c-7c11-11e4-8e85-7c2977880457.png)

I just saved as a Progressive jpg.

I will optimize the other images too, as soon as I can.

Keep rocking!

\,,/