Update usage doc

Author: Mishbah

docs/usage.rst

@@ -2,6 +2,44 @@
 Usage
 ========
 
-To use django-modeladmin-reorder in a project::
+1. Add `admin_reorder` to `INSTALLED_APPS`::
 
-    import django-modeladmin-reorder
+    INSTALLED_APPS = (
+        ...
+        'admin_reorder',
+        ...
+    )
+
+
+2. Add the `ModelAdminReorder` to `MIDDLEWARE_CLASSES`::
+
+
+    MIDDLEWARE_CLASSES = (
+        ...
+        'admin_reorder.middleware.ModelAdminReorder',
+        ...
+    )
+
+
+3. Add the setting `ADMIN_REORDER` to your settings.py::
+
+
+    ADMIN_REORDER = (
+        # Keep original label and models
+        'sites',
+
+        # Rename app
+        {'app': 'auth', 'label': 'Authorisation'},
+
+        # Reorder app models
+        {'app': 'auth', 'models': ('auth.User', 'auth.Group')},
+
+        # Cross-linked models
+        {'app': 'auth', 'models': ('auth.User', 'sites.Site')},
+
+        # models with custom name
+        {'app': 'auth', 'models': (
+            'auth.User',
+            {'model': 'auth.Group', 'label': 'User Group'},
+        )},
+    )