Added old PCL demos.
Added heat map visualization for the display.
Added an option to see the normal texture (without the distortion correction) fullscreen by pressing T.
Added an experimental frustum visualization (need to fix).
Added several calibration parameters and can now switch between fixed calibration and free-movement(calibration does not seem correct yet).
Added separate X and Y rotation of the first-person camera (need to also add Z rotation).
Added an option to print the current modelview matrix.
MouseLook is now disabled by default when starting the demo with the first-person cam. It can be enabled by pressing 0. (currently rotation drifts to one side, need to fix this)
Fixed frustum display