Initializes the D-axis on Hangprinter and counts advance_dividend and…

[tobbelobb]

… delta_offsets for D-axis

Description

Hangprinter users reported their D-axes weren't moving.

I tracked down the issue to E1 pins not being initialized, and that advance_dividend and delta_error arrays hadn't been prepared for Hangprinter usage (D_AXIS not used).

Benefits

Hangprinter+Marlin users gains control over their D motors.

[thinkyhead]

When GitHub returns back to normal this will, I hope, automagically be rebased, and then I'll merge it. I'm not trusting GitHub until all the bizarre errors and glitches seen today are solved.

[tobbelobb]

When GitHub returns back to normal this will, I hope, automagically be rebased, and then I'll merge it. I'm not trusting GitHub until all the bizarre errors and glitches seen today are solved.

@thinkyhead You're right. This does look bizarre. I have messages that "all checks passed" and "the travis cl build failed" showing simultaneously. And your comment shows only in my email inbox, not in this thread (Github's web interface). I did fetch and rebase right before creating the PR, so no further rebase should be needed.

Hope it gets sorted out. The patch is really a small one. I could just send you a patch file via email if Github keeps having glitches.