Remove bootstrap files, replace with bourbon ones.

No styling or structure fixes done.
Move bitters to stylesheet root
Alerts, logo and some cleaning up.
Fix tests after RSpec upgrade.
Menu fixes
Rework nav bar and search form styles.
Redo searching so people can link to it.
Finish off search form.
Resource new/edit form styles.
Admin interface fixes.
Hero unit on front page.
Home page finished.
Front page styling.
Resource show page styling.
Merge branch 'bourbon'

Mostly finished replacing bootstrap styling with bourbon, except for devise forms.