Update commands to reflect latest changes.
labels: Fixing linting errors.
proxy: fixing linting errors.
scheduler: use New rather than Make for construction helpers.
proxy: lock should be above the fields it protects.
Fixes golint errors in pkg/labels
Fixes golint errors in pkg/master
Fixes golint errors in pkg/proxy
Changed the keepChannel to buffered channel.

Since the keepChannel is used to send data, not just for synchronizaiton,
so make it a buffered channel can avoid unnecessary goroutine yields.
Merge pull request #445 from yifan-gu/buffered_chan

Changed the keepChannel to buffered channel.
adding firewall instructions to the README
Merge pull request #447 from juliaferraioli/master

Add firewall instructions to the update demo
Add link env vars.
Merge pull request #440 from brendandburns/link

Add Docker link style env vars to link containers to services.
Update services to use the internal IP and port, now that its available.
Add a /healthz handler to the kubelet server, so that the master can validate kubelet health.
Address comments.
Add support for memory limits in the kubelet.
Merge pull request #419 from brendandburns/health

Add a /healthz handler to the kubelet server
Add a template printer to kubecfg.