Add continuous deploy to Heroku
Adding deployment to heroku, making sure ruby build passes

Cleaning up travis yml.

Adding Rake to Gemfile, cuz thats what Travis said.

Adding Rake to lock.

Adding ruby and version explicitly, writing before script commands.

Fixing db creation command because I cant read.

Adding migrate step to travis.

Switching db create and db creation.

Adding bundle exec, and removing db creation.

Adding tests against ruby head and restarting heroku post deploy.

Updating Gemfile to accomodate multiple ruby builds.

Switching heroku deploy key to CFA.

Switching heroku deploy to transitmix-staging.
Removing testing for ruby-head for now.
Simplify travis build
Set RACK_ENV to test during build
Revert "Set RACK_ENV to test during build"

This reverts commit 3be4d74c44435143c0a36d2f2ecfb752de8ab8b2.
Merge pull request #24 from codeforamerica/auto-deploy

Add continuous deploy to Heroku