added a check and error message for server version mismatch.
Merge pull request #7 from cloudnautique/docker_version_error_msg

Error message when docker version is to old
Set private IP and tell cattle agent to use it
Merge pull request #9 from cloudnautique/set_cattle_agent_ip

Set private IP and tell cattle agent to use it
Support node in Agent and upgrading
Refactor to remove dependency on cattle/server
Cattle v0.5.1
Rebase Dockerfile on correct cattle/server
Fix upgrade that doesn't set the CATTLE_AGENT_IP
Set image version to master
Fix upgrade behavior to maintain env vars properly
Cattle version 0.6.0
Made startup error dynamic.

There is also situations where /var/run/docker.sock is not
read / writable by the container. This will result in a
permission denied error.
Merge pull request #21 from cloudnautique/better_error_message

Made startup error dynamic.
Cattle v0.7.0