Bootstrap v3 + some new things

Some big changes here. Moving to BS v3 for better look on mobile. This required adding Twitter Typeahead, as BS removed typeahead in v3. Quite a bit had to change in the markup. Also added the latest score for a business up top on the show page and made the Violations lists collapsible. All in all looks better on mobile and ok on Desktop. Still want to change some things but it's at a good point now.