add gl view and renderer
support glsurfaceview and cameraview overlapping
clean codes
add some comments
trying moving eyes
add rotate cube in the screen
integrate texture cube
fix the light position. augment ambient light
simulate eye moving
add rotation recognization
refine rotation recognition
adding linear accelerometer
adding linear accelerometer for pace
remove firstrotatedegree, no need to keep that.
refine linear accelerometer pace detection
pace detection in good condition
current pace detection
revise the algorithm to detect pace
prepare for another algorithm for pace detection
another pace detection first version