Fix floating point exception and add --continue-on-error flag#4

mosoriob wants to merge 2 commits intodevelopIn-For-Disaster-Analytics/PotreeConverter:developfrom

3-fix-floating-point-exception-in-potreeconverter-chunkerIn-For-Disaster-Analytics/PotreeConverter:3-fix-floating-point-exception-in-potreeconverter-chunkerCopy head branch name to clipboard