setup: Add classifiers & README for pypi

setup.cfg

@@ -8,6 +8,20 @@ author = Philippe Pepiot
 author-email = phil@philpep.org
 summary = Test infrastructures
 home-page = http://github.com/philpep/testinfra
+description-file = README.rst
+classifier =
+    Development Status :: 3 - Alpha
+    Intended Audience :: Information Technology
+    Intended Audience :: System Administrators
+    License :: OSI Approved :: Apache Software License
+    Operating System :: POSIX
+    Programming Language :: Python
+    Programming Language :: Python :: 2
+    Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3.4
+    Topic :: Software Development :: Testing
+    Topic :: System :: Systems Administration
+
 
 [files]
 packages =