method browser into a separate class in its own module.

entry if the menu is disabled. This does create a circular reference, so cleanup
becomes more important.

exit status is zero.

so balloons haven't been working for ages. Apparently nobody noticed:-)

real one.

message.

recalculated.

Also added MD5Type object.

caller (in import.c) will test for errors and take appropriate action.

Closing it now also does the right thing.

source, but it doesn't yet show the stack).

assign the exception info to sys.last_{type,value,traceback}.  That
way, an introspective Tkinter app can inspect its own stack trace.

(The controversy is that it would keep some objects alive, but that's
probably no big deal.)

statements now also stop at ';' (formerly they only stopped at '#').

x/yview_scroll/moveto.)

and it opens the source.

Other stuff so the PyShell window can be resurrected from the Windows menu.

Create a simple Windows menu.  (Imperfect when Untitled windows exist.)
Add wakeup() method: deiconify, raise, focus.