Update readme.rst

Add readme.rst

Add LICENSE

add serial IO for sending temps to Artisan

change wiring for display to free up serial port

try to make RoR more accurate in the case of the thermocouple returning NaN for a while

When the thermocouple board returns NaN for a while and then returns a temperature the
temperature smoothing smears the change (that happened over a relatively long time)
over several probably smaller samples. This causes the RoR to become inaccurate because
the rate of change is calculated over the later, smaller samples instead of only the span
when there was not a valid temperature to calculate with. This commit changes the
smoothing applied to the temperature so the longer it has been since a valid temperature,
less weight is applied to the past temperature, and more is applied to the valid
temperature when one is returned.

try to make RoR more accurate

make temperature readouts redder if bad readings

finish rewrite to loop continuously

rewrite to loop continuously, not tested yet

improve RoR accuracy, refactor timer code, make style more consistent

clean up code and adjust smoothing parameters

add check for nan result on environment thermocouple

initial commit