Added simple flush function to the arduino VectPrint library
Changed the calibration mode. It uses 'c' to toggle the mode, 'r,'p', and 'y' to increment the roll pitch and yaw fields, which are the first 3 fields. the second 3 fields are the sins of the angles just in case they are needed.
fixed the arduino calibration code to make it easy to calibrate
added the angle pictures to the repo in case we need to print it again