add Uri based routing config API to docs

Author: timbussmann

README.md

@@ -14,11 +14,17 @@ transport.Routing().UseFileBasedRouting();
 
 This will configure the endpoint to look for a `endpoints.xml` file in the endpoints [base directory](https://msdn.microsoft.com/en-us/library/system.appdomain.basedirectory(v=vs.110).aspx).
 
-It is possible to configure a different relative or absolute file path, e.g.:
+The routing file path can be configured using relative or absolute paths, e.g.:
 
 ```
 transport.Routing().UseFileBasedRouting(@"..\..\..\endpoints.xml");
 ```
+
+It is also possible to provide an `Uri` to the routing file:
+
+```
+transport.Routing().UseFileBasedRouting(new Uri("https://your-server.com/endpoints.xml"));
+```
 
 The routing file provides routing information like shown in the following example: