Add text I/O for Kripke structures.

* src/kripke/kripkeexplicit.cc, src/kripke/kripkeexplicit.hh,
src/kripke/kripkeprint.cc, src/kripke/kripkeprint.hh: New files.
* src/kripke/Makefile.am: Add them.
* src/kripkeparse/fmterror.cc, src/kripkeparse/kripkeparse.yy,
src/kripkeparse/kripkescan.ll, src/kripkeparse/parsedecl.hh,
src/kripkeparse/public.hh, src/kripkeparse/scankripke.ll: New
files.
* src/kripkeparse/Makefile.am: Add them.
* src/kripketest/bad_parsing.test, src/kripketest/defs.in,
src/kripketest/kripke.test, src/kripketest/origin,
src/kripketest/parse_print_test.cc: New files.
* src/kripketest/Makefile.am: Add them.
* src/Makefile.am (SUBDIRS): Add kripkeparse and kripketest.
* README: Document src/kripketest/ and src/kripkeparse/.
* configure.ac: Generate src/kripkeparse/Makefile,
src/kripketest/Makefile, src/kripketest/defs.
* iface/dve2/defs.in (run2): New function.
* iface/dve2/dve2check.cc (syntax, main): Add option -gK.
* iface/dve2/kripke.test: New file.
* iface/dve2/Makefile.am (TESTS): Add kripke.test.

src/Makefile.am

@@ -28,8 +28,8 @@ AUTOMAKE_OPTIONS = subdir-objects
 # libspot.la needed by the tests).
 SUBDIRS = misc ltlenv ltlast ltlvisit ltlparse eltlparse tgba		\
           tgbaalgos tgbaparse evtgba evtgbaalgos evtgbaparse kripke	\
-          saba sabaalgos neverparse . ltltest eltltest tgbatest		\
-          evtgbatest sabatest sanity
+          saba sabaalgos neverparse kripkeparse . ltltest eltltest      \
+	  tgbatest evtgbatest sabatest sanity kripketest
 
 lib_LTLIBRARIES = libspot.la
 libspot_la_SOURCES =
@@ -50,7 +50,8 @@ libspot_la_LIBADD =  \
   evtgbaparse/libevtgbaparse.la \
   saba/libsaba.la \
   sabaalgos/libsabaalgos.la \
-  kripke/libkripke.la
+  kripke/libkripke.la \
+  kripkeparse/libkripkeparse.la
 
 # Dummy C++ source to cause C++ linking.
 nodist_EXTRA_libspot_la_SOURCES = _.cc