Update sensor code with speed and filespace improvements.#3

Merged

erichiggins merged 3 commits intomasterfrom performance

Feb 19, 2019

+118-135

Commits on Jan 27, 2019

Update sensor code with speed and filespace improvements.
erichiggins
committed

Commits on Feb 19, 2019

Clean up comments. Write data using G instead of meters-per-sec-squared.
erichiggins
committed
Use actual G values for acceleration instead of raw values.
erichiggins
committed