Update readme.md with additional testing. (#12)

Author: otac0n

readme.md

@@ -191,8 +191,10 @@ The latest PDF URL can be found in [HIDUsageTablesPDF.url](HIDUsageTablesPDF.url
 
 ## Testing status
 
-I have tested the following controllers:
+The following controllers have been tested:
 * Saitek X-52 Pro Flight Control System,
+* Saitek Pro Flight X-56 Rhino Stick,
+* Saitek Pro Flight X-56 Rhino Throttle,
 * Razer Sabertooth Elite
 * Microsoft XBox One for Windows Controller (_**Note** that XInput-compatible HID device driver only transmits events from the HID device whilst the current process has a focussed window, so console applications/background services don't appear to work! That is not usually an issue for games with a focused window, but it does affect the sample application. This is not a bug in this library._)