add an additional view to preview all the colors in the category

All the colors are nice, but you only show off a few in the demo screen.  This adds a new screen that shows off all of the colors provided by the category.

![ios simulator screen shot jul 20 2013 3 53 50 pm](https://f.cloud.github.com/assets/47840/830781/2351a2d8-f176-11e2-8896-c04cb9e8053e.png)