Added Bulegiga iWRAP support into HHKB.(Bluetooth)

adb_usb/README

@@ -59,4 +59,12 @@ effort at this time.
     ),
 
 
+Notes
+-----
+Many ADB keyboards has no discrimination between right modifier and left one,
+you will always see left control even if you press right control key.
+Apple Extended Keyboard and Apple Extended Keyboard II are the examples.
+Though ADB protocol itsef has the ability of distinction between right and left.
+And most ADB keyboard has no NKRO functionality, though ADB protocol itsef has that. 
+
 EOF