Release in the 0.2.6xx series, compatible with embedded-hal-0.2.6
Main changes:
- ability to set calibration offsets
- [breaking] move to fixed-point arithmetic, with all measurements represented using integers:
- temperature measurements move from degrees Celsius to milli degrees Celsius and from Fahrenheit to milli degrees Fahrenheit
- humidity measurements move from percent (%) to per cent mille (pcm)
- all values are essentially 1000*x where x was the value reported in previous releases
- add optional "fp" feature which enables conversion from integer measurement representation to floating point, SI representation (Celsius, Fahrenheit, %)