* dont fail on satin with fill
* fill stitch error message
* convert to satin mac issue
* auto_satin: add rung for two node old style satins
* avoid divide by zero in intersect_region_with_grating
* fix for incorrect stagger in guided fill
* better rail sectioning algorithm
* fix#1780
* fix#1816
Co-authored-by: Lex Neva
* guide line position
* use direction from line to shape
* optimize intersection detection
* fix flapack elf
* handle weird guide lines better
* update starting point for self crossing (multiple) fills
* ripple: fixes and non circular join style
* avoid jumps in ripple stitch
* fallback only necessary if shape does not intersect grating
* make valid may return a polygon
* add profiling
* Stitch.__init__ didn't work right and was super slow
* shrink or grow to multipolygon
Co-authored-by: Lex Neva