Adds logging configuration
Include a slugignore file

This is helpful for Heroku deployments and can also be used as a source
for file exclusions in a deployment that uses rsync in any part of the
process, e.g. copying the project from a source controlled cache
location to a new release directory.
Specify the Python runtime

As of time of commit Python 3.4.1 and Python 2.7.8 are supported.