prefer separate command for approximation

removed junk from library theory

note of_class rule for type classes in theory: useful to promote class instance proofs to locale interpretation proofs

normalizing of type variables before evaluation with explicit resubstitution function: make nbe work with funny type variables like \<AA>; tuned naming; dropped dead parameters;

tuned GUI;

clarified detach_operation: ignore empty output;

bounce focus back to main text area -- Output is for output, not query input;

update for release;

merged

tuned message;

no qualifier for now, to avoid confusion concerning loaded_theories in PIDE interaction;

some position markup to help locating the query context, e.g. from "Info" dockable;

tuned GUI;

tuned GUI;

tuned GUI;

tuned message: more compact, imitate actual command line;

enable "PIDE" docking framework by default, and rely on its "Detach" menu item;

some odd tricks to provide "Detach" menu item, via "PIDE" docking framework;

untyped, unscoped, unchecked access to JVM objects;

Documented new property

generate 'map_ident' theorem for BNFs

explicit option to build library, which takes most of the time; produce minimal index, e.g. for test web page;

NEWS;

merged

more symbols; tuned proofs;

tuned message: "step" goes back to TTY mode before Proof General, while "depth" is more informative but sometimes confusing due to implementation details;

print results as "state", to avoid intrusion into the source text; print new local theory (again);

run commands as interactive, again after long history of fluctuation (9e196062bf88, 173974e07dea, e07dacec79e7) and quite different infrastructure for print tasks;