Adding .editorconfig
Adding Dockerfile

* Based on 'centos' image
* Maintained by me :)
Adding a simple build script

build.sh is just a simple wrapper around the docker build command. It
tags the image with 'olesu/centos-puppet' and extracts the version from
the current git HEAD.
Specify which centos image tag to use (centos7)
Merge branch 'feature/0.0.1' into develop