Update cartodb-postgresql submodule to point to 0.16.0
Update cartodb-postgresql submodule to point to 0.16.0

codeandtheory/cartodb,CartoDB/cartodb,CartoDB/cartodb,codeandtheory/cartodb,CartoDB/cartodb,codeandtheory/cartodb,splashblot/dronedb,CartoDB/cartodb,splashblot/dronedb,codeandtheory/cartodb,splashblot/dronedb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb,codeandtheory/cartodb