remove various debugging junk: all uses of xdebug removed (but not the xdebug memory...

remove various debugging junk: all uses of xdebug removed (but not the xdebug memory reservation); all mention of qq* removed; all debugging statements turned into calls to D macros or removed; D macros improved (from just D to Dv, Dl, Df); remove all D calls and debugging stuff from i2clib.asm; all uses of any morse_TI* removed (but definitions remain in morse.messages)