Even less shuffling of stdout (only at start of new interpreter).

Interact properly with new interpreter initialization conventions
(must use Py_Initialize/Py_Finalize *and*
Py_NewInterpreter/Py_EndInterpreter).

Probably more minor changes.

Removed pprint.py from the README; it's now in the standard lib.

Added pformat() function:  formats object to a string representation with
	no trailing newline; returns the string.

 Demo/parser/texipre.dat):
	Clean up support files for stand-alone documentation formatting,
	make sure copyright statement is consistent with the copyright.

Added exp(z).

	arguments and explicit calls to .pack() are used; no more dictionaries
	are being passed to Tkinter constructors.  Otherwise, the example is
	unchanged.  (The app isn't implemented as a Python object.)