setup.py: Add long_description attribute to data

so that there's no text breakage on PyPI page

setup.py

@@ -165,13 +165,35 @@ def has_docs(self):
 
     sub_commands = build.sub_commands + [('build_docs', has_docs)]
 
+long_description = \
+'''This is a Python implementation of John Gruber's Markdown_. 
+It is almost completely compliant with the reference implementation,
+though there are a few known issues. See Features_ for information 
+on what exactly is supported and what is not. Additional features are 
+supported by the `Available Extensions`_.
+
+.. _Python-Markdown: http://packages.python.org/Markdown/
+.. _Markdown: http://daringfireball.net/projects/markdown/
+.. _Features: http://packages.python.org/Markdown/index.html#Features
+.. _`Available Extensions`: http://packages.python.org/Markdown/extensions/index.html
+
+Support
+=======
+
+You may ask for help and discuss various other issues on the
+`mailing list`_ and report bugs on the `bug tracker`_.
+
+.. _`mailing list`: http://lists.sourceforge.net/lists/listinfo/python-markdown-discuss
+.. _`bug tracker`: http://github.com/waylan/Python-Markdown/issues
+'''
 
 data = dict(
     name =          'Markdown',
     version =       version,
     url =           'http://packages.python.org/Markdown/',
     download_url =  'http://pypi.python.org/packages/source/M/Markdown/Markdown-%s.tar.gz' % version,
     description =   'Python implementation of Markdown.',
+    long_description = long_description,
     author =        'Manfred Stienstra, Yuri takhteyev and Waylan limberg',
     author_email =  'markdown [at] freewisdom.org',
     maintainer =    'Waylan Limberg',