Add dockerfile for latest Ubuntu image, remove init service in original dockerfile and add extra logging in masterserver.sh

[wooffet]

• Add ubuntu:latest dockerfile and compose file
• Remove init service from Dockerfile and replace with a build step in each service definition - will be gotten from cache after first build
• Add some additional logging to masterserver.sh
• Add windows client files to .gitignore

[wooffet]

This also includes a fix for #22 in the Run step of Dockerfile.ubuntu-latest. By adding the following snippet, the repository hosting libssl1.0.0 is added to the sources.list file of the container which allows it to be installed with apt-get:

... echo "deb http://security.ubuntu.com/ubuntu xenial-security main" >> /etc/apt/sources.list \ && apt-get update \ ...