Activate OneWire crc functions
Library isse fix

Fixed some library issues due to a different and more compatible
arduino makefile on OS X
Merge branch 'kalman-filter' of https://github.com/phbender/brewslave into phbender-kalman-filter
Fixed Kalman library issues

Fixed Kalman library issues and made Kalman usage optional
Make Kalman default in Arduino IDE
made code a little bit more expressive
Merge pull request #6 from phbender/make-code-more-expressive

made code a little bit more expressive
Introduced a slave state and added set temperature display
Resolved some name issues