Changes FindPython to FindPython3, because I couldn't get FindPython to play nice with conda-build.
Disables BUILD_DOC when building the Python library
Fixes issue with VERSION_STRING, it could not be passed as a CMake option, because the default was set to a boolean value, which could not be changed to a string.
Adds LANGUAGES to CMake's project() definition
Use sscanf on unix platforms in STLReader (speeds up the STLReader a whole lot)
Use RelWithDebInfo for release builds, and add .dSYM file on macOS for source mapping and better debugging support.
Enable link time optimization
Zip CXX libraries before release (I had to add them manually before)
Add custom delocate script on macOS, and prefer system OpenMP before loading the bundled one.
sscanfon unix platforms in STLReader (speeds up the STLReader a whole lot)