Added order display functionality
Added CDisplay class
Added display pin numbers
Merge branch 'master' of github.com:NottingHack/BarBot into order-display

Conflicts:
	src/arduino/BarBotSerial/BarBotSerial.ino
	src/arduino/lib/BarBot/BarBot.cpp
	src/arduino/lib/BarBot/BarBot.h
	src/web/bb1.go
Merge branch 'order-display'