[FIX] lxml 3.0a2 has been deployed to pypi for some reason, pin to lxml < 3 for now

bzr revid: xmo@openerp.com-20120830100034-baug3vb3wlfncf5e

setup.py

@@ -95,7 +95,7 @@ setuptools.setup(
           'docutils',
           'feedparser',
           'gdata',
-          'lxml',
+          'lxml < 3',
           'mako',
           'psycopg2',
           'pydot',