Make manifest url reader accept both single and multiple manifests.
Add kubelet testing to integration test. Test that kubelet makes the requested containers. Check that the url manifest feature works.
Readability fixes & address review comments.
Make integration test the manifest url feature. Make kubelet's docker pull command testable.
Merge pull request #213 from lavalamp/fix_manifest

Better fix of #212
Update the proxy server.
Initial add of cloud-demo