Updates haml-lint to 0.8.0
Refactors hiding of feedback form when JS disabled

- In order to remove the ohanapi.org dependency, removes link to
ohanapi.org form and only displays issue tracker link for Ohana Web
Search repository when JS is disabled.
Fixes haml-lint offenses
Merge pull request #699 from codeforamerica/upgrade-haml-lint

Updates haml-lint to 0.8.0