Moved Transset_includes_summands and Transset_sum_Int_subset to
QUniv.thy to eliminate use of merge_theories. Proved Memrel_type.
Added Krzysztof's theorems Memrel_mono, Memrel_empty, lt_Ord, succ_le_imp_le
#! /bin/csh
grep "$*" {Pure/Syntax,Pure/Thy}/*ML */*ML */*/*ML