Update sphinx and add read the docs

docs/index.rst

@@ -9,3 +9,33 @@ Installation
 .. code-block:: shell
 
    pip install django_session_timeout
+
+Usage
+=====
+
+Update your settings to add the SessionTimeoutMiddleware:
+
+.. code-block:: python
+
+    MIDDLEWARE_CLASSES = [
+        # ...
+        'django.contrib.sessions.middleware.SessionMiddleware',
+        'django_session_timeout.middleware.SessionTimeoutMiddleware',
+        # ...
+    ]
+
+
+And also add the ``SESSION_EXPIRE_SECONDS``:
+
+
+.. code-block:: python
+
+    SESSION_EXPIRE_SECONDS = 3600  # 1 hour
+
+
+By default, the session will expire X seconds after the start of the session.
+To expire the session X seconds after the `last activity`, use the following setting:
+
+.. code-block:: python
+
+    SESSION_EXPIRE_AFTER_LAST_ACTIVITY = True

setup.py

@@ -3,7 +3,7 @@
 from setuptools import find_packages, setup
 
 docs_require = [
-    'sphinx>=1.4.0',
+    'sphinx>=1.8.4',
 ]
 
 tests_require = [