Solaris and Linux: use os.O_NONBLOCK.

searches /usr/local, /usr and /.

would always be a hit.   Prevent this by only using VPATH if we know
we are in the build directory.

otherwise laudible attempt to rationalize the argument parsing): it
would save a copy of the original string instead of a reference to it.
Go back to saving a reference, but keep the "s#" format (using a hack
that involves two argument parsing steps, first using "O", then using
"s#").

- Window has a titlebar, and title() changes it
- The label is changed with label()
- The window is now movable-modal
- Cancel is now called Stop, and works.

this many bytes have been read, readlines stops.  Because of
buffering, the amount of bytes read is usually at least 8K more than
the hint.

Also changed read() and readline() to use PyArg_ParseTuple().

(Note that the *previous* checkin also fixed error handling and
narrowed the range of thread unblocking for all methods using
fread().)

Indigo2, reading a 9Meg file from the local disk.

see if we can guess the #bytes until the end of the file.  If we
can't, increment the buffer size increments up to 0.5Meg to avoid
realloc'ing too much.

Infinite failure stack, some bugs fixed (fastmap, star_jump, register bug).

Document how to get exit status of a popen() command.

behind the shell window on NT.