Merge pull request #1 from danburkert/cassandra

Small cleanups / minor refactoring to CassandraDataRequestAdapter
Remove stale HBase unit tests I added.
Merge branch 'cassandra-from-joe' of github.com:wibiclint/kiji-schema into cassandra-from-joe
Add CQLUtils and refactor table creation CQL
refactor CassandraDataRequestAdapter CQL statements into CQLUtils
refactor CQLUtils and add notes about CQL primary key translation
add components comparator for Entity IDs