Add SPM dependencies instead of git submodules and more#2

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SpectralDragon wants to merge 1 commit intoutahwithak:masterfrom

SpectralDragon:master

Commits on Oct 5, 2020

Add SPM dependencies instead of git submodules, also add SCNView to macOS version and remove QHull and using ConvexHull instead
Владислав Прусаков
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