multistep param parsing
multistep param parsing

this should have linear complexity, unlike the old regex with all
the backtracking it required.

stanhu/cassandra-dbapi2,iGivefirst/cassandra-dbapi2,maraca/cassandra-dbapi2,diezguerra/cassandra-dbapi2,iflatness/cql,EnigmaCurry/cassandra-dbapi2,josh-mckenzie/cassandra-dbapi2,pandu-rao/cassandra-dbapi2,flowroute/cassandra-dbapi2,mshuler/cassandra-dbapi2,pcmanus/python-cql,CanWeStudio/cassandra-dbapi2