@ash => First eidolon pr - UI work

I started out working on the view where you place your bid. 
I added our button pod and made some subclasses for the types of buttons that I touched -- keypad buttons, the buttons that you hit to go to the next screen.
Added a UIText field subclass with the correct grey border color, which I will be placing in other views too.
Fixed some of the math and NSNumberFormatter problems that I encountered -- ask me if it's not self explanatory.
I also added a color palette with the 5 or so artsy colors, but I'm not sure if this is something that gets saved with the project, or to my install of xcode. I thought it might be helpful though.
I need to add tests. In the mean time, here is a screenshot of how it's looking. Note: Katarina asked me to change the color of the text buttons on the keypad to black although designs show grey.
![screen shot 2014-10-02 at 6 13 51 pm](https://cloud.githubusercontent.com/assets/3171662/4499363/7512c3e4-4a81-11e4-90d5-0131141d17f4.png)
 We can hold off on merging until I add tests, it just felt like a good time to push a chunk of changes.