Support new revision of Balanduino PCB
Update comment, as Arduino 1.5.7 was released
Indentation - no code change
Swapped encoder1 and encoder2 pins in encoder reading, as leftEncoder1 was located on bit0 in the new revision of the PCB

This needs testing
Encoders has to be inverted after: 8b078c4823cff87c15c3fd38b091437d779ca07e

This was expected
Inline interrupt functions on new revision of PCB

This improves speed and reduces code size!
Use static keyword to reduce code size and increase speed

I have inlined all functions that is only used once
Get rid of a lot of unnecessary global variables
Add static keyword to the rest of the global variables
Merge branch 'master' into dev