Updated README.

Author: selwin

README.rst

@@ -6,6 +6,9 @@ to the database.
 Installation
 ------------
 
+.. image:: https://travis-ci.org/ui/django-cached_authentication_middleware.png?branch=master
+
+
 * Install via pypi::
 
     pip install django-cached_authentication_middleware
@@ -32,6 +35,31 @@ Installation
 
 And you're done!
 
+Cached Auth Preprocessor
+------------------------
+
+Sometimes you want to preprocess to ``User`` instance before storing
+it into cache. ``cached_auth`` allows you to define
+``settings.CACHED_AUTH_PREPROCESSOR``, a callable that takes two arguments, ``user`` & ``request`` and returns a ``User`` instance.
+
+A classic example of this would be to attach ``Profile`` data
+to ``User`` object so calling ``request.user.profile`` does not incur a
+database hit. Here's how we can implement it.
+
+```python
+
+def attach_profile(user, request):
+    try:
+        user.get_profile()
+    # Handle exception for user with no profile and AnonymousUser
+    except (Profile.DoesNotExist, AttributeError):
+        pass
+
+
+# In settings.py:
+CACHED_AUTH_PREPROCESSOR = 'path.to.module.attach_profile'
+```
+
 Running Tests
 -------------
 
@@ -46,6 +74,12 @@ To run the test suite with Django custom user (this will run only on Django 1.5)
 Changelog
 ---------
 
+Version 0.2.0
+=============
+
+* Added support for Django 1.5's customer user model
+* Added ``CACHED_AUTH_PREPROCESSOR`` setting
+
 Version 0.1.1
 =============