Improved service root folder wording

Author: inclement

doc/source/services.rst

@@ -80,7 +80,8 @@ Services support a range of options and interactions not yet
 documented here but all accessible via calling other methods of the
 ``service`` reference.
 
-This kind of service has the app root folder in sys.path instead
-of the folder where it's file is. This means that you have to
-type "import service.module" instead of "import module", if the
-service file is in "service/" folder
+.. note:: The app root directory for Python imports will be in the app
+root folder even if the service file is in a subfolder. To import from
+your service folder you must use e.g.  ``import service.module``
+instead of ``import module``, if the service file is in the
+``service/`` folder.