Created by: nortikin
Gcode node 2021
initial: https://github.com/nortikin/sverchok/issues/2288 https://github.com/nortikin/sverchok/pull/2298 update_issue: https://github.com/nortikin/sverchok/issues/2723
I met folk going to G-print and asking him to test. Hope he can handle.
Preflight checklist
Put an x letter in each brackets when you're done this item:
- 
Code changes complete.  - 
Code documentation complete.  - 
Documentation for users complete (or not required, if user never sees these changes).  - 
Manual testing done.  - 
Unit-tests implemented.  - 
Ready for merge.