debug.h:Align M111 debug bit codes with Repetier-Host.

the pid_tuning branch might be cool, but... I had a couple problems with RepetierHost:

1) the software sends a M111 S15 per https://github.com/repetier/Repetier-Host/blob/f01afccee26c93d2158dbfd04458a65a0b869449/src/RepetierHost/view/PrintPanel.cs#L401

2) The Repetier Host sender filters the G-code so that:

    M130 S0.1
appears to drom the decimals and send:
    N2558M130S0*120

While a lack of spaces seem to screw up the sender
    M130S1
sends:
    N2670M130*50