New PIDS

Added service calls and equations for Boost, AFR, Fuel Pressure, BATs
and corrected the KR service call (not tested yet).
Made some defines for button presses instead of looking at binary values
Created a "gaugePage" variable that will change which set of parameters
are being displayed. This is changed using the button up/down on the
steering wheel.

Boost values go very negative when over 18psi. Need to format the
display screens better to clear out old data.
LCD strings corrected

Realized that the different "gaugePages" weren't writing the entire LCD
cause old data to be displayed.