Updated Build server for Docker 1.3 with TLS

After several [attempts](https://github.com/JWGmeligMeyling/build-server/compare/spotify-docker-client), I haven't been able yet to integrate the existing Docker clients into this repository, because they rely on Jersey instead of Resteasy. Therefore, in this PR I just took the keystore from the [Spotify Docker Client](https://github.com/spotify/docker-client) and configured it for Resteasy. I also updated Resteasy to a newer version. To get things to work on my system, I had to change the way the volumes are mounted. We need to check if this is related to Boot2Docker hosts or the newer Docker versions before deployment.
Maybe we want to retrieve these values from the docker environment variables, because now we have to set these manually.

```sh
#To connect the Docker client to the Docker daemon, please set:
    export DOCKER_HOST=tcp://192.168.59.103:2376
    export DOCKER_CERT_PATH=/Users/jgmeligmeyling/.boot2docker/certs/boot2docker-vm
    export DOCKER_TLS_VERIFY=1
```