FreeBSD-11.1-RELEASE-p9 running Ultimaker Cura natively!!!!

Only thing that was needed was to rebuild py36-qt5-opengl with info from this abandoned port patch: https://reviews.freebsd.org/D12982, and this added to cura_app.py "os.environ['LD_LIBRARY_PATH'] = '/usr/local/lib/gcc6'" after the "import os" line.

All code was checked out from the master branch of Ultimaker/Cura, Ultimaker/CuraEngine, Ultimaker/Uranium and Ultimaker/libArcus on Thursday, June 7th at 1:30pm eastern time.