tuned proofs -- prefer explicit names for facts from 'interpret';

merged

eliminated questionable Par_List.map -- locale interpretation is mostly lazy (see also b81f1de9f57e);

tuned signature;

tuned;

use lazy notes for locale context init and later additions of facts;

avoid premature Lazy.force due to strict "?" operator;

Merge

Merge

lots of new material, ultimately related to measure theory

merged

support for lazy notes in global/local context and Element.Lazy_Notes: name binding and fact without attributes; register_proofs is now based on lazy thms, but Thm.consolidate_theory will eventually force this (in parallel); support for lazy notes for locale activation (still inactive);

tuned;

tuned: more parallel;

clarified modules;

clarified modules;

tuned;

tuned;

tuned signature;

tuned: more accurate transfer;

store facts as lazy values;

clarified operations;

misc tuning and clarification;

clarified signature;

clarified modules;

more operations;

added lemma

tuned;

clarified signature;

misc tuning and clarification; removed unused all_registrations_of;

clarified signature;

more explicit instantiate_morphism (without checks for typ / term component);