Adding the template for backing map functionality to
storm-cassandra-cql. 

TODO: Need to add getting and putting functionality to the map. Also
need to consider the tuple mapping interface for key, value pairs.
Work in progress towards finishing backing map for cassandra
Delete log4j.properties
Delete schema.cql
Fully functioning backing map that utilizes the Cassandra Cql
infrastructure. An example word count topology is also utilized to
display the persistent aggregation on the backing map.
Create WordCountAndSourceMapper.java
Update WordCountTopology.java
Update schema.cql

Added source to the wordcounttable for multiple primary keys in table.
Reverting back to original example topology.
Merge pull request #2 from leerobert/master

Fully Functional Backing Map for Cassandra CQL3