allow default address 0 to match any address. This ensures detected devices (with a real address) match configured "first on bus" devices.
optimization - blocks of code are identical apart from the delay durations.
Merge branch 'develop' of https://github.com/BrewPi/brewpi-avr into develop
fix for issue #37 - removed use of INT_MAX, and replaced with appropriate constant.
fixed relative library in brewpi_sim and removed full path from project.xml
fixed spelling error in BrewPi.h