Unified the DMR() constructors so they all initialize the fields in essentially the same way.
Unified the DMR() constructors so they all initialize the fields in essentially the same way.

OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4