Added heroku and ruby version to Gemfile.
Use unicorn webserver.
Merge remote-tracking branch 'origin' into deploy

Conflicts:
	Gemfile.lock
Merge pull request #8 from LaunchAcademy/deploy

Deploy
submit link at top
review user validation
Include travis configuration.
Merge pull request #13 from LaunchAcademy/configure_travis

Include travis configuration.
Merge branch 'master' into update_and_delete_cats