Adding a Voldemort service to consume PUT and DELETE messages from Kafka

Adding a new Store layer to perform Kafka consumption. Includes configuration properties, such that original workflow is unaffected.
This is taken from 0.8 Kafka Consumer Example:
https://cwiki.apache.org/confluence/display/KAFKA/0.8.0+SimpleConsumer+Example

Consumer Task is continually running and a 1 second delay is used between iterations. We can discuss better ways to do this though.