Convert stylesheets from LESS to locally compiled Stylus.

- Convert to Stylus and Nib middleware.
- Remove example files generated by Express.
- Add Bootstrap 3.0.0 Stylus files.
- Update directory structure to allow for live compiling.
- Add spacer class for vertical spacing between rows.
Merge pull request #88 from sgunturi/convert-to-local-stylus

Convert styling to local Stylus files.