Add support for py36 and Django 1.11 to readme/classifiers (#498)

Author: michael-k

README.rst

@@ -19,8 +19,8 @@ pytest-django allows you to test your Django project/applications with the
   <https://pytest-django.readthedocs.io/en/latest/contributing.html>`_
 * Version compatibility:
 
-  * Django: 1.7-1.10 and latest master branch (compatible at the time of each release)
-  * Python: CPython 2.7,3.3-3.5 or PyPy 2,3
+  * Django: 1.7-1.11 and latest master branch (compatible at the time of each release)
+  * Python: CPython 2.7,3.3-3.6 or PyPy 2,3
   * pytest: >2.9.x
 
 * Licence: BSD

setup.py

@@ -42,6 +42,7 @@ def read(fname):
                  'Programming Language :: Python :: 3.3',
                  'Programming Language :: Python :: 3.4',
                  'Programming Language :: Python :: 3.5',
+                 'Programming Language :: Python :: 3.6',
                  ],
     # the following makes a plugin available to pytest
     entry_points={'pytest11': ['django = pytest_django.plugin']})