Closes SF patch #600861.

Minor markup changes.

If a rexec instance allows writing in the current directory (a common
thing to do), there's a way to execute bogus bytecode.  Fix this by
not allowing imports from .pyc files (in a way that allows a site to
configure things so that .pyc files *are* allowed, if writing is not
allowed).

I'll apply this to 2.2 and 2.1 too.

translation more difficult, as well as reading the English more
difficult for non-native speakers.

Added some comments about sys.exit(), SystemExit, and preventing restricted
code from exiting the interpreter.

This closes SF bug #434743.

Fix up a few synopses.

Added description of BastionClass, since it is referred to in the Bastion
description as subclassable.

works better with LaTeX2HTML, and allows some simplification of the python.sty
macros.

checkin of myformat.sty.

Change "\renewcommand{\indexsubitem}{(...)}" to "\setindexsubitem{(...)}"
everywhere.

Some other minor nits that I happened to come across.

	* \bcode, \ecode added everywhere
	* \label{module-foo} added everywhere
	* A few \seealso sections added.
	* Indentation fixed inside verbatim in lib*tex files