Merge kripketest, graphtest and ltltest into tests

* README, configure.ac, iface/ltsmin/Makefile.am,
src/tests/defs.in, src/tests/.gitignore, src/tests/Makefile.am,
src/Makefile.am: update references.
* src/kripketest/.gitignore, src/kripketest/Makefile.am,
src/kripketest/defs.in, src/graphtest/.gitignore,
src/graphtest/Makefile.am,
src/graphtest/defs.in, src/ltltest/.cvsignore,
src/ltltest/.gitignore, src/ltltest/Makefile.am,
src/ltltest/defs.in:: remove files.
* src/kripketest/bad_parsing.test, src/kripketest/kripke.test,
src/kripketest/origin, src/kripketest/parse_print_test.cc,
src/ltltest/bare.test, src/ltltest/consterm.cc,
src/ltltest/consterm.test, src/tests/defs.in,
src/ltltest/equals.test, src/ltltest/equalsf.cc,
src/ltltest/eventuniv.test, src/ltltest/exclusive-ltl.test,
src/graphtest/graph.cc, src/graphtest/graph.test,
src/ltltest/isop.test, src/ltltest/kind.cc,
src/ltltest/kind.test, src/ltltest/latex.test,
src/ltltest/lbt.test, src/ltltest/length.cc,
src/ltltest/length.test, src/ltltest/lenient.test,
src/ltltest/ltlcrossgrind.test, src/ltltest/ltlfilt.test,
src/ltltest/ltlgrind.test, src/ltltest/ltlrel.cc,
src/ltltest/ltlrel.test, src/ltltest/lunabbrev.test,
src/ltltest/nenoform.test, src/graphtest/ngraph.cc,
src/graphtest/ngraph.test, src/ltltest/parse.test,
src/ltltest/parseerr.test, src/ltltest/rand.test,
src/ltltest/readltl.cc, src/ltltest/reduc.cc,
src/ltltest/reduc.test, src/ltltest/reduc0.test,
src/ltltest/reduccmp.test, src/ltltest/reducpsl.test,
src/ltltest/remove_x.test, src/ltltest/stutter-ltl.test,
src/ltltest/syntimpl.cc, src/ltltest/syntimpl.test,
src/graphtest/tgbagraph.test, src/ltltest/tostring.cc,
src/ltltest/tostring.test, src/ltltest/tunabbrev.test,
src/ltltest/tunenoform.test, src/graphtest/twagraph.cc,
src/ltltest/unabbrevwm.test,src/ltltest/utf8.test,
src/ltltest/uwrm.test: rename as...
* src/tests/bad_parsing.test, src/tests/kripke.test,
src/tests/origin, src/tests/parse_print_test.cc,
src/tests/bare.test, src/tests/consterm.cc,
src/tests/consterm.test, src/tests/equals.test,
src/tests/equalsf.cc, src/tests/eventuniv.test,
src/tests/exclusive-ltl.test, src/tests/graph.cc,
src/tests/graph.test, src/tests/isop.test,
src/tests/kind.cc, src/tests/kind.test,
src/tests/latex.test, src/tests/lbt.test,
src/tests/length.cc, src/tests/length.test,
src/tests/lenient.test, src/tests/ltlcrossgrind.test,
src/tests/ltlfilt.test, src/tests/ltlgrind.test,
src/tests/ltlrel.cc, src/tests/ltlrel.test,
src/tests/lunabbrev.test, src/tests/nenoform.test,
src/tests/ngraph.cc, src/tests/ngraph.test,
src/tests/parse.test, src/tests/parseerr.test,
src/tests/rand.test, src/tests/readltl.cc,
src/tests/reduc.cc, src/tests/reduc.test,
src/tests/reduc0.test, src/tests/reduccmp.test,
src/tests/reducpsl.test, src/tests/remove_x.test,
src/tests/stutter-ltl.test, src/tests/syntimpl.cc,
src/tests/syntimpl.test, src/tests/tgbagraph.test,
src/tests/tostring.cc, src/tests/tostring.test,
src/tests/tunabbrev.test, src/tests/tunenoform.test,
src/tests/twagraph.cc, src/tests/unabbrevwm.test,
src/tests/utf8.test, src/tests/uwrm.test: ...these!

iface/ltsmin/Makefile.am

@@ -41,10 +41,10 @@ check_SCRIPTS = defs
 TESTS = check.test finite.test finite2.test kripke.test
 EXTRA_DIST = $(TESTS) beem-peterson.4.dve finite.dve finite.pm
 
-kripke.test: $(top_builddir)/src/kripketest/parse_print$(EXEEXT)
+kripke.test: $(top_builddir)/src/tests/parse_print$(EXEEXT)
 
-$(top_builddir)/src/kripketest/parse_print$(EXEEXT):
-	cd $(top_builddir)/src/kripketest && \
+$(top_builddir)/src/tests/parse_print$(EXEEXT):
+	cd $(top_builddir)/src/tests && \
 	$(MAKE) $(AM_MAKEFLAGS) parse_print$(EXEEXT)
 
 distclean-local: