project :-).  Change object administration: objects are removed from the
list of known objects as soon as their form is destroyed.

calls the repr function.  When the refcount is bad, don't print
the object at all (chances of crashes).
Changes to checking and printing of references: the consistency
check is somewhat faster; don't print strings referenced once
(most occur in function's name lists).

(fetch the filename as a string so I can see it with dbx, and set f_lineno);
call abort() when detecting an "undetected" error.

(no bit vector)

Also use locks and Queues for communication with other threads.

Added runcall(func, *args) interfaces to profile.py, bdb.py, pdb.py, wdb.py
Added new module bisect.py and used it in sched.py.
Mostly cosmetic changes to profile.py (changed output format).

update thread package.

receives a REDRAW event

added an output() function to move the I/O out of the algorithm

Viewer.py in turn requires changes to VFile.py (unfortunately that file
is now a complete mess...).

Added optional read-ahead thread.
Changed mouse interface.