Dockerfile

Here's a Dockerfile for putting sangrenel in a Docker image, along with usage instructions. The Docker container executes the sangrenel binary, passing in the specified options. Sometimes it's easier to just run a Docker container than build things. :)

This should also be easy to set up as an automated build in Docker Hub, if you're interested: http://docs.docker.com/docker-hub/builds/

sangrenel is pretty awesome, btw - thanks for creating it!