Fix#45 afonly#49

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RGD2 wants to merge 7 commits intojamesbowman:masterfrom

RGD2:fix#45-afonly

Commits on May 18, 2016

Merge pull request #6 from jamesbowman/master
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Commits on May 3, 2017

Fix #45 without new uart - just async_in_filter
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Commits on May 4, 2017

Removes uart3.v -- replacement uart wasn't needed.
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