* bench/ltl2tgba/algorithms: Reduce the number of Spot configuration
tested.
* bench/ltl2tgba/Makefile.am (run, small.txt, big.txt, known.txt):
New rules.
* bench/ltl2tgba/big, bench/ltl2tgba/small, bench/ltl2tgba/known:
Add a 15min timeout to the lbtt configuration.
* bench/ltl2tgba/defs.in: Adjust variable definitions to accept
variable inderections.
* bench/ltl2tgba/parseout.pl: Add an option to output the table in
LaTeX. Also consider all formulae, not just the positive
formulae.
* bench/ltl2tgba/README: Update.
