add Maintainer Metadata

setup.py

@@ -10,6 +10,7 @@ setup(name='xml_marshaller',
 Marshals simple Python data types into a custom XML format.
 The Marshaller and Unmarshaller classes can be subclassed in order
 to implement marshalling into a different XML DTD.
+Originals Author are XML-SIG (xml-sig@python.org).
 Fully compatible with PyXML implementation, enable namespace support for
 XML Input/Output.
 Implemented with lxml""",
@@ -21,6 +22,8 @@ classifiers=['Development Status :: 4 - Beta',
       keywords='XML marshaller',
       author='XML-SIG',
       author_email='xml-sig@python.org',
+      maintainer='Nicolas Delaby',
+      maintainer_email='nicolas@nexedi.com',
       url='http://www.python.org/community/sigs/current/xml-sig/',
       license='Python License (CNRI Python License)',
       packages=find_packages(exclude=['ez_setup', 'examples', 'tests']),