fix for fridge setting not working (copy paste error: beerSetting instead
of fridgeSetting)
removed receiving constants and settings at the start of the script.
they are now only requested. The receive is handled asynchronously later.
The script would choke on receiving the settings with the UNO. This is a
better, cleaner implementation.
removed hardcoded parameters for programming Arduino. Values from web
interface are now used. Also added printing of the avrdude and avr-size
commands.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	brewpi.py