Move testing back to rio for Cassandra.
Merge branch 'rbdevel' of github.com:openconnectome/open-connectome into rbdevel

Conflicts:
	ocpca/casskvio.py
	ocpca/ocpcaproj.py
	test/kvengine_to_test.py
	test/test_io.py
	test/test_other.py
	test/test_query.py
	test/test_ramon.py