Fix cosine table#124

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tonokip wants to merge 3 commits intomainfrom

Commits on Jan 1, 2021

fix shell script that runs the iverilog microstepper testbench by removing board.v
tonokip
committed
change quarter wave cosine table to one that is symmetrical across the quarter intervals and crossing zero
tonokip
committed

Commits on Jun 30, 2021

Merge branch 'main' into tk/fix_cosine
sjkelly
authored