We need to show demo to Dr. Co at Apr.22

Done:
1. OpenGL + MFC
2. Save to BMP
3. Collide case
4. Mouse drives beam, hide cursor ( ShowCursor(FALSE); )
Not:
1. Bead model
2. Not quite sure about the memory image now
3. For sure tracking.
Problems:
1. L-R-Buttons don't do pause now.
2. Can't control the beam's color.