Gadfly patch to use re instead of regex

[Brian Lenihan]

I patched Gadfly to use the re module instead of the deprecated regex
module.  I posted the patch to the patch manager of the peerkat
project on Sourceforge.

http://sourceforge.net/tracker/?atid=397511&group_id=29835&func=browse

Normally, I'd send the patch to the author, but Aaron has not shown
any interest in maintaining Gadfly of late.  I hadn't used Gadfly
until I was toying with peerkat and got annoyed by the deprecation
warnings, so I decided to fix it.

The patch was tested on OS X and Win2k.  The patch makes the minimal
changes necessary to use re and should work with all versions of
Python from 1.5.2 and later.