Use docker

[mathuin]

https://www.docker.io/

My goal is to create a Dockerfile from the instructions in README.md which can allow people to more easily build and run TopoMC.

If this goes well, the next step is to build a web-based front end for TopoMC.

[mathuin]

Actually, now that I think about it, redoing the front end is going to have to come first.