Create Docker build scripts

[Rickard von Essen]

I was looking into rebuild these packages and started to create some scripts that could be used together with Docker to spit out packages based on the documentation in build from scratch. But then I saw that you already use such setup in Jenkins build. Maybe you can publish the source for the docker build images.

[Nils Andreas Svee]

All the Dockerfiles I use are available here (one branch per image): https://github.com/Lochnair/dockerfiles

Each image is built by automatically by Jenkins and then pushed to Docker Hub.