[Xcb] Python X11 encoder/decoder based on XCB

[Mark Seaborn]

I have been working on an X11 message encoder/decoder written in
Python based on the XCB protocol definitions.  It covers most of the
extensions that XCB covers (at least, the unit tests pass for
converting messages back and forth).

It includes a couple of protocol monitor tools.  The first tool dumps
the request and response streams of a proxied X11 connection to two
files, which can be decoded by the second tool.

The code is under Subversion here:
svn://svn.gna.org/svn/plash/scratch/x11-proxy

and there are further notes about it here:
http://plash.beasts.org/wiki/X11ProxySpike

Cheers
Mark