Implemented X axis set and report mapping in M563 command and in web and
M408 status responses (but mapping doesn;t do anything yet)
Report number of axes to DWC
M307 H# A-1 C-1 D-1 disables the pid controller for that heater to free
up the pin
Debug print of matrixes during delta calibration is now to 4dp
Implemented fan blip
