Sass refactor

Pulls in updates from the following PRs in
ohana-web-search:
- codeforamerica#371
- codeforamerica#380
- codeforamerica#381
- codeforamerica#391
- codeforamerica#392
- codeforamerica#395
- codeforamerica#356

With the following differences:
- The ‘kind’ code is retained.
- tabs are converted to spaces.
- min-height is added to results-entries.
- cassettes and tests are updated.