Garden Trove classifiers and keywords.

setup.py

@@ -6,16 +6,25 @@
       long_description=(open("README.rst").read() + "\n" +
                         open("CHANGES.rst").read()),
       classifiers=[
-          'Framework :: Zope2',
-          'Programming Language :: Python',
+          'Development Status :: 6 - Mature',
+          'Environment :: Web Environment',
+          'Framework :: Zope :: 4',
+          'Intended Audience :: Developers',
+          'License :: OSI Approved :: Zope Public License',
+          'Operating System :: OS Independent',
           'Programming Language :: Python :: 2.7',
+          'Programming Language :: Python :: 2 :: Only',
+          'Programming Language :: Python :: Implementation :: CPython',
+          'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
+          'Topic :: Software Development',
+          'Topic :: Text Editors :: Text Processing',
       ],
       author="Zope Foundation and Contributors",
       author_email="zope-dev@zope.org",
       maintainer="Chris McDonough",
       maintainer_email="chrism@plope.com",
       license="ZPL 2.1",
-      keywords="zope external editor",
+      keywords="zope external editor WebDAV",
       url="https://github.com/zopefoundation/Products.ExternalEditor",
       packages=find_packages(),
       namespace_packages=['Products'],