Feature/docs (#165)

* initial readthedocs commit

* docs moved to sphinx / rst / read the docs

docs/features/authorisation.rst

@@ -0,0 +1,18 @@
+Authorisation
+=============
+
+Ocelot supports claims based authorisation which is run post authentication. This means if
+you have a route you want to authorise you can add the following to you ReRoute configuration.
+
+.. code-block:: json
+
+    "RouteClaimsRequirement": {
+        "UserType": "registered"
+    }
+
+In this example when the authorisation middleware is called Ocelot will check to see
+if the user has the claim type UserType and if the value of that claim is registered. 
+If it isn't then the user will not be authorised and the response will be 403 forbidden.
+
+
+