replaced id, var, tid, tvar by idT, varT, tidT, tvarT;
added const, free, var: build atomic terms of dummyT;
added 'xnum' (signed numerals) and 'xstr' (strings) token kinds;
various minor internal changes;
#! /bin/sh
#rm-logfiles: remove useless files from subdirectories
rm log */make*.log */make*.log.gz
rm */test
rm */.*.thy.ML
rm */ex/.*.thy.ML
rm HOL/Subst/.*.thy.ML