Remove all cvsignore files.

* .cvsignore, bench/.cvsignore,
bench/emptchk/.cvsignore, bench/emptchk/models/.cvsignore,
bench/ltl2tgba/.cvsignore, buddy/.cvsignore,
buddy/doc/.cvsignore, buddy/examples/.cvsignore,
buddy/examples/adder/.cvsignore,
buddy/examples/bddcalc/.cvsignore,
buddy/examples/bddtest/.cvsignore,
buddy/examples/calculator/.cvsignore,
buddy/examples/cmilner/.cvsignore,
buddy/examples/fdd/.cvsignore,
buddy/examples/internal/.cvsignore,
buddy/examples/milner/.cvsignore,
buddy/examples/money/.cvsignore,
buddy/examples/queen/.cvsignore,
buddy/examples/solitare/.cvsignore,
buddy/src/.cvsignore, buddy/tools/.cvsignore,
doc/.cvsignore, iface/.cvsignore,
src/.cvsignore, src/ltlast/.cvsignore,
src/ltlenv/.cvsignore, src/ltlparse/.cvsignore,
src/ltlvisit/.cvsignore, src/misc/.cvsignore,
src/sanity/.cvsignore, src/tests/.cvsignore,
src/twa/.cvsignore, tools/.cvsignore,
wrap/.cvsignore, wrap/python/.cvsignore,
wrap/python/tests/.cvsignore: here.

tools/.cvsignore

@@ -1,9 +0,0 @@
-depcomp
-install-sh
-missing
-mkinstalldirs
-py-compile
-config.guess
-config.sub
-ltmain.sh
-compile