Boring edition

new

• width % is now in function of nozzle diameter instead of layer height.
• add "taper" at the begin/end of thin walls when <100% (may help to print better)
• add setting to set the overlap between thin walls and perimeters.

bugfix

• remove some unwanted gapfill
• bugfix ironing #37
• bugfix solid margin #36
• bugfix thin wall width (not exactly the right size)
• bugfix on the connected lines of gyroid infill
• bugfix dense infill ctd

** issues

• seems like vase mode isn't working correctly, i didn't had the time to check yet.