New hal pin gmoccapy.ignore-limits

As Mr. Snowden asked, I introduced that new pin to enable the ignore-limits checkbox also with a hardware hal pin.

It is a HAL BIT IN pin
If it gets TRUE it will set the checkbox to ignore the limits.

The behavior will be checked before executing the command, so the signal will be ignored if no limit switch is active.
The signal will only be checked if the signal gets high (TRUE), so if you switch is on and you go to a limit switch, the signal eill not be emitted, until you open and close again your switch. So do not use momentary switch, better a key switch.

Norbert

P.S.
Pushed right now to 2.7 and will push to master in a few moments.