adds feedback button and modal
adds labels, moves modal code out of mailchimp.js
submits feedback to google form
Fix Travis deployment to heroku.

Specify buildpack and git strategy.
removes extra code, links fb button to google form
Merge pull request #58 from codeforamerica/fix-travis-config

Fix Travis deployment to heroku.
merges with master
adds new loading gif
Merge branch 'master' into kh-full-data-modal