Rename tgbatest into tests.

* src/Makefile.am, README, configure.ac: update references.
* src/tgbatest/: rename as...
* src/tests/: ...this!

README

@@ -153,7 +153,7 @@ src/              Sources for libspot.
    priv/          Private algorithms, used internally but not exported.
    ta/            TA objects and cousins (TGTA).
    taalgos/       Algorithms on TA/TGTA.
-   tgbatest/      Tests for twa/, twaalgos/, ta/ and taalgos/.
+   tests/      	  Tests for twa/, twaalgos/, ta/ and taalgos/.
    twa/           TωA objects and cousins (Transition-based ω-Automata).
    twaalgos/      Algorithms on TωA.
       gtec/       Couvreur's Emptiness-Check.
@@ -203,7 +203,7 @@ End:
  LocalWords:  Python's BuDDy LBTT LTL Büchi lbtt gspn DIR GreatSPN Soheib Yann
  LocalWords:  Baarir Thierry Mieg CVS Università di Torino devel src libspot ac
  LocalWords:  ltlast ltlenv ltlparse ltlvisit ltltest misc tgba TGBA tgbaalgos
- LocalWords:  gtec Tarjan tgbatest doc html PDF spotref pdf cgi ELTL
+ LocalWords:  gtec Tarjan doc html PDF spotref pdf cgi ELTL
  LocalWords:  CGI ltl iface BDD Couvreur's emptchk kripke Kripke saba vm
  LocalWords:  eltlparse eltltest SABA sabaalgos sabatest ssp ltlcouter scc SCC
 LocalWords:  formulae optimizations kripkeparse kripketest Automata

configure.ac

@@ -222,8 +222,8 @@ AC_CONFIG_FILES([
   src/twa/Makefile
   src/taalgos/Makefile
   src/ta/Makefile
-  src/tgbatest/defs
-  src/tgbatest/Makefile
+  src/tests/defs
+  src/tests/Makefile
   wrap/Makefile
   wrap/python/Makefile
   wrap/python/ajax/Makefile

src/Makefile.am

@@ -27,7 +27,7 @@ AUTOMAKE_OPTIONS = subdir-objects
 # libspot.la needed by the tests)
 SUBDIRS = misc priv ltlenv ltlast ltlvisit ltlparse graph twa		\
           twaalgos ta taalgos kripke kripkeparse dstarparse hoaparse	\
-          . bin ltltest graphtest tgbatest kripketest sanity
+          . bin ltltest graphtest tests kripketest sanity
 
 lib_LTLIBRARIES = libspot.la
 libspot_la_SOURCES =

src/tests/Makefile.am

@@ -60,7 +60,9 @@ taatgba_SOURCES = taatgba.cc
 
 # Keep this sorted by STRENGTH.  Test basic things first,
 # because such failures will be easier to diagnose and fix.
-TESTS = \
+TESTS = $(TESTS_twa)
+
+TESTS_twa = \
   acc.test \
   acc2.test \
   intvcomp.test \