deploy to heroku
deploy to heroku

missing: deploy key.
The owner of the heroku app has to create this by running:

  `travis encrypt $(heroku auth:token) --add deploy.api_key`

lplotni/pace,mduemcke/pace,lplotni/pace,mduemcke/pace,lplotni/pace,cz8s/pace,cz8s/pace,cz8s/pace