tweak: adds creation of keyspace to schema.cql

This patch tweaks the schema.cql to allow a user to simple do:

cqlsh < path/to/schema.cql In order to create the schema on their
cluster.
fix: dynamic importing with datastax driver

This patch fixes a bug whereby the real datastax driver can't be used
becausee of the manner in which it is being imported. The cluster
submodule must be loaded specifically, then the cluster object can be
insantiated.