Fuel cost implemented and working, alternates on bargraph display every 2 seconds.
Fuel cost while driving.  Working in the car.
Merge branch 'master' of https://github.com/skelliam/mpguino-fork into FuelCost
Renamed files to new extension for Arduino 1.0
Fix compile error with Arduino 1.0
Added doc folder to git
Merge commit 'd6ef3a'