Replaced ordermap_z_lepoll by ordermap_z_lt, which is
stronger and has a simpler proof. Modified proof of ordermap_csquare_le
accordingly.
#! /bin/sh
#rm-logfiles: remove useless files from subdirectories
rm log */make*.log */make*.log.gz
rm */test
find . -name '.*.thy.ML' -print -exec rm {} \;