Admin/polyml/polyml

simplify definition of XOR for type int;
reorder some lemmas

#!/usr/bin/env bash
#
# Minimal Poly/ML startup script

THIS="$(cd "$(dirname "$0")"; pwd)"

export LD_LIBRARY_PATH="$THIS:$LD_LIBRARY_PATH"
export DYLD_LIBRARY_PATH="$THIS:$DYLD_LIBRARY_PATH"

exec "$THIS/poly" "$@"