Neck exercise
Added face direction detection and a simple neck exercise
FaceDirectionChanged enum
checkFaceDirection(id) : FaceDirectionChanged
// Reads the face direction and returns FaceDirectionChanged enum
neckExercise() : void // Runs a 3 instruction neck exercise
printFalseDir() : void
// helper for neckExercise that displays
// and speaks when wrong direction is faced.
Edited by Kelvin Chung