Styleboard component styles.

Very WIP.

This PR has the following objectives:
- Remove flat-ui dependency.
- Add all styles from the PSD in the MVP.

Flat UI was a good kit for bootstrapping, but it does some things I do not like. It uses px definitions for font sizes which doesn't gel with our responsive approach. That said, there's tons of great CSS in the kit, so I'll be looking more towards *repurposing* whatever is contained there and modifying as needed.

@davidclarkmoore  Given your UI experience obviously you know plenty of CSS3. Comment, ask questions, or make any remarks you want.