Add a PodCache that is responsible for caching pod information.
Not wired in yet.
Merge pull request #162 from brendandburns/poll

Add a PodCache that is responsible for caching pod information.
On delete, also attempt to update controller state, in case we
missed a previous update.  Add a test to validate that this works
Merge pull request #165 from brendandburns/replicas

On delete, also attempt to update controller state
Add location of where to get the gcloud tools to README.md
Merge pull request #43 from drewcsillag/master

Add location of where to get the gcloud tools.
Separate labels and selector in services for clarity
Rename [label] query to selector
Update guestbook example
Update api sources. Still need to regen documentation.
Rename ReplicasInSet to ReplicaSelector
Fix one more service example
fix after rebase