Add version information for components we depend on.

Sample output:
Version: {KernelVersion:3.11.0-17-generic ContainerOsVersion:Ubuntu 14.04 LTS DockerVersion:1.0.0}

This is the start of the debug page. Still need to add cgroup and namespaces status plus the final debug page.
did this not work?:

release := []byte(uname.Release)

else, we can also re-use the i from the loop var:
for i, c :=range uname.Release {
  ...
}