fetch_teleop praram clarification

[ruffsl]

It took me a bit to realize I wasn't referencing the param for the fetch_teleop node correctly. It wasn't until I looked again at the source as well as a launch file in startup that I realized I wasn't using the Teleop Component namespace prefix. Could this be better documented, say in that package or teleop page?

e.g:

  <node name="teleop" pkg="fetch_teleop" type="joystick_teleop">
-    <param name="button_deadman" value="4"/>
+    <param name="base/button_deadman" value="4"/>
  </node>