Merge pull request #7 from vishh/rootCgroup

Export root cgroup as machine info.
Merge pull request #8 from vishh/rootCgroup

Usability improvements and godep updates
Merge pull request #9 from vishh/rootCgroup

Use the kubernetes master service.
Cleanup Readme
Update heapster image name
Add Fleet unit files

Thanks to @andrewwebber
Modify grafana container to its hostname to access InfluxDB instead of querying metadata server.