Crash fixes (fixed #2, fixed #3)#5

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afrixs wants to merge 9 commits intojmlien:masterfrom

Commits on Nov 19, 2019

Commits on Nov 20, 2019

more crash fixes:
afrixs
committed

Commits on Nov 27, 2019

colinearity crash fixes
afrixs
committed

Commits on Nov 28, 2019

Commits on Feb 7, 2020

Commits on Feb 20, 2020

removed boundaries check which is not needed when hole merging padding
afrixs
committed