The synchronisation and robustness release

• Added synchronisation of the PKI (users, certificates and keys) between multiple running instances
• Enabled >1 instances to be started at the same time and match their local data
• Cleaned up the output to stdout
• Refactored a number of functions in run.sh to improve robustness
• Increased CPU resource from 0.1 to 1.0 due to DC/OS 1.10 now enforcing CPU usage - required for key generation.
• Fixed #13
• Improved the function to find the public address
• Fixed the hostports in the marathon.json
• Changed znode path from dcos-vpn to openvpn
• Updated notes on znode ACL management
• Bumped the version number which should have happened in the last release to reflect the change in functionality

Now with added security

• Added Flask-BasicAuth for the REST interface
• Enabled TLS in Flask and linked to the openvpn SSL assets
• Configured an ACL on the /openvpn Zookeeper znode to protect assets
• Added full synchronisation and cleanup of assets to and from Zookeeper
• Added correct revocation of clients
• Merged openvpn and openvpn-admin functionality, openvpvn-admin is now deprecated
• Refactored bin/run.sh and added helper functions
• Moved source repository from github.com/mesosphere to github.com/dcos-labs