added "spass_tptp" prover, which requires SPASS x.y > 3.0;
once users have upgraded their SPASS and we have determined that "spass_tptp" works well, we can make "spass_tptp" the one and only "spass"
#!/usr/bin/env bash
#
# polyml-version --- determine Poly/ML runtime system version
echo -n polyml
if [ -x "$ML_HOME/poly" ]; then
env LD_LIBRARY_PATH="$ML_HOME:$ML_HOME/../lib:$LD_LIBRARY_PATH" \
DYLD_LIBRARY_PATH="$ML_HOME:$ML_HOME/../lib:$DYLD_LIBRARY_PATH" \
"$ML_HOME/poly" -v -H 10 | \
sed -n 's,^Poly/ML.*RTS version: [^ ]*\(-[^ ]*\).*$,\1,p'
fi