all algorithms from a file.  Use the emptiness_check_instantiator
syntax as name in the output.
* bench/emptchk/defs.in: DEfine ALGORITHMS here.
* bench/emptchk/ltl-human.sh, bench/emptchk/ltl-random.sh,
bench/emptchk/pml-clserv.sh, bench/emptchk/pml-clserv.sh: Use
$ALGORITHMS.
* src/misc/timer.cc: Truncate long keys in display.