Merge 2020-10-16_suggestions from infixes#11

Merged

jgfoster merged 17 commits intocptr450from

Nov 9, 2020

Commits on Oct 27, 2020

Commits on Nov 4, 2020

Fix definition of SFR macro to prevent linker errors about duplicate symbol
ianfixes
committed

Commits on Nov 9, 2020

Explore possible fix for #187.
James Foster
committed
Tests now pass
James Foster
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Merge branch '2020-10-16_suggestions' into cptr450-a
James Foster
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Merge branch 'sfr_mock' into cptr450-a
James Foster
committed