Add foreman procfile

Based on feedback from [this meta post](http://meta.discourse.org/t/i-wrote-a-procfile-would-it-be-worth-including-in-the-repo/2961) I've created a basic Profile that should work for most any environment. This also pairs well with a poorly written [upstart script](http://paste.ubuntu.com/1641951/) that I hope to refine and eventually add to the repo.