@ashfurrow => ability to dismiss conditions/privacy

Made the modal for terms and conditions/privacy look a little more design-y

I put in the navigation toolbar on the bottom because there are links to other documents on each of the pages we're presenting. We can talk to Katarina about this. They're tappable either way, but it's frustrating if you tap on something and can't get back.

Added a CLOSE button to the modal that looks like the CANCEL button we display throughout bid fulfillment.
![modal](https://cloud.githubusercontent.com/assets/3171662/4728369/17660dac-5975-11e4-9671-fdcfc88bbd1b.gif)


the presenting view controller will hold a strong reference to it until the presentation is finished, should be :+1: