add dyno_monitor.py

due to issues running python and ruby side by side in the same heroku instance, the present plan for this is to run in our private jenkins instance.  if the script exits with 1 or 2, an alert should be issued.

python 2.7+ and `pip install heroku` are the dependencies.

the environment variables needed to configure are the heroku app name and a valid api key.

@e0d @gwprice