* src/ltlvisit/exclusive.cc, src/ltlvisit/exclusive.hh: Implement
constrain() for automata.
* src/bin/autfilt.cc: Add --exclusive-ap option.
* src/tgba/bdddict.cc, src/tgba/bdddict.hh: Add a
has_registered_proposition() method.
* src/tgbatest/exclusive.test: New file.
* src/tgbatest/Makefile.am: Add it.