Clarify no coverage option.

README.rst

@@ -7,17 +7,23 @@ Jannis Leidel's `django-discover-runner
 
 Inspired by `django-coverage <https://bitbucket.org/kmike/django-coverage/>`_.
 
-Usage
------
+Quick usage
+-----------
 
-To run the tests type:
+To run the tests, type:
 
     ./manage.py test [options] [appname ...]
 
-To run the tests without code coverage (i.e. run django-discover-runner instead) type:
+To run the tests without code coverage (i.e. run ``django-discover-runner``
+instead), type:
 
     ./manage.py test --no-coverage [options] [appname ...]
 
+If you want to use the ``--no-coverage`` option, make sure you add
+``discoverage`` to your ``INSTALLED_APPS``.
+
+Detailed usage
+--------------
 
 One of the objectives of ``django-discover-runner`` is to allow the separation
 of a Django app's tests from the code it's testing. Since tests no longer reside