* iface/gspn/Makefile.am (EXTRA_DIST): Add $(TESTS).
(TESTS, check_SCRIPTS, distclean-local): New.
* iface/gspn/dcswave.test, iface/gspn/simple.test,
iface/gspn/defs.in: New files.
* iface/gspn/dottygspn.cc (main): Take the list of properties
of interest in argument.
