Reviewer Matt - Better clustering order

Change to using 'Cassandra Order' when creating crest nodes.  Also make the creation of the keyspaces the responsibility of node index 1 (fixing #13).

Tested by tediously resizing the amc deployment 1->2->3->5->3->2->1 and checking `nodetool ring` and `echo "DESC KEYSPACE homestead;" | cqlsh -3 -k homestead`.