Add dependency on "couchbase" to the "couchbase-stellar-nebula" gemspec file
Define a ClusterRegistry class which will map the connection string to the appropriate Cluster object (see PHP code)
In the Cluster.connect method of the classic SDK add code that will preserve the current behaviour if existing connection schemes are used and use the ClusterRegistry otherwise
In "couchbase-stellar-nebula", add code that registers itself to the ClusterRegistry
Improvement
Major