Merge pull request #1 from rjnagal/scaler0

Introducing auto scaler for kubernetes.
Add number of pods to aggregator to identify empty machines.
We might not need this when we add actual pod information.
Merge pull request #2 from rjnagal/aggregate

Add number of pods to aggregator to identify empty machines.
Adding a sample scaling policy - "weekday" policy. This will serve as an example to add
more complex auto scaling policies in the future.