[gDesklets] Move to Python >=2.4?

[Joe Sapp <sappj ieee org>]

Hi all,

Currently we have a dependency on >= Python 2.3 for gDesklets.  I'd like to
request bumping that up to 2.4, at least so we can use generator expressions
[1].  Any objections?

Thanks,
Joe

[1] http://www.python.org/dev/peps/pep-0289/