changelog stuff for 1.0.6
changelog stuff for 1.0.6

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