Add Windows/Mac compatibility, implement the UBX-RXM-RAWX message, fix timeout bug.#14

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davidallen353 wants to merge 3 commits intosparkfun:masterfrom

the-aerospace-corporation:feature/add-rxm-rawx-msg

Commits on Nov 26, 2020

Added the definitions of the UBX-RXM-RAWR message and methods to access it.
David William Allen
committed

Commits on Nov 27, 2020

Added a bypass for spidev on unsupported platforms
David William Allen
committed
Added function to call the RAWX messages
David William Allen
committed