- Timer 0 is disabled in flashlight() and safeMode() in case its
variables overlap the bootloader "magic key" location.
- Flashlight mode never exits if invoked.
- Made safeMode() public for use as a smaller code size alternative
to flashlight().
This eliminates calls to pinMode(), digitalWrite(), functions to
initialize hardware, etc.
New 2 parameter version of digitalWriteRGB() added, which sets an
individual RGB LED on or off digitally.
New function SPItransfer() added to replace Arduino SPI.transfer().
Scott Allen