sane numerals (stage 1): added generic 1, removed 1' and 2 on nat,
"num" syntax (still with "#"), Numeral0, Numeral1;
time_use_thy "Mutil";
time_use_thy "Term";
time_use_thy "ABexp";
time_use_thy "Tree";
time_use_thy "Ordinals";
time_use_thy "Sigma_Algebra";
time_use_thy "Comb";
time_use_thy "PropLog";
time_use_thy "SList";
time_use_thy "LFilter";
time_use_thy "Exp";