adds the ability to define a set of environment variables to let you connect to a TLS secured swarm manager.
improves parsing of the SystemStatus array in the swarm managers GET /info response. (this wasn't previously working for me on docker version 1.11.2 - the position of elements in the SystemStatus array doesn't seem consistent across docker versions)
the container graph now uses vis.js and displays a network graph of swarm agents connected to the management cluster and all containers connected to each agent.
containers on the container/node network graph are labelled with container name & image name, each container icon is green if running & red if exited.
This PR adds the following enhancements: