Make it installable from cheeseshop.

[Jajcus]

I would like to simple include ''pyxmpp'' in my ''zc.buildout'' configs without defining the download URI in the ''dependency_links'' section. You guys already have a pypi account but do not provide a download link also your snapshot names seem to have no valid version string, could you change them to use svn revision numbers or something setuptools can understand?

Also would it be possible to include your dependencies in the ''install_requires'' section of the setup.py file? A patch for that is attached.

[Jajcus]

(In [712]) - meta-data updates (re #22)

--jajcus