Added More Flexible Support for Mac OS X#2

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Commits on Nov 29, 2021

Added the modifications that allowed for this to work on Mac OS X Version 11.5.2 (Minus the modifications which need to be done to make_lib.go for lp_solve support).
kwesiRutledge
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Added support for creating the lp_solve header lines in lib.go by the script make_lib.go
kwesiRutledge
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Removing nmac-specific lib.go from tracking.
kwesiRutledge
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