Temporarily removed Rewrite from the translation code so that parsing with work on lists of numbers. Will now signal if ATP has run out of time and then kill the watcher.

* Pure: the Isar proof context type is already defined early in Pure as Context.proof;

added find2

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tunes Find

added Rules/find2

tuned pointer_eq;

renamed data kind;

removed proof data (see Pure/context.ML);

added depth_of;

removed obsolete object.ML (see Pure/library.ML);

export sort_ord; tuned term_ord, typ_ord: use pointer_eq; tuned aconv, aconvs: based on term_ord;

renamed init to init_data;

added structure Object (from Pure/General/object.ML);

tuned;

begin_thy: merge maximal imports; incorporate proof data; added generic context;

removed Pure/Isar/proof_data.ML, Pure/General/object.ML;

improved proof;

obsolete (see Pure/context.ML);

tuned;

pointer equality for sml/nj

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tuned

added -H false