Add a clip+mc mode instead of the really bad original slice.
Update auto play mode so isoValue moves between 1 to 30 and back to 1
Update Mandlebulb tests to use the auto-play flag.

This way we can verify that multiple marching cube passes work properly
Make the auto-play demo to show off marching cubes and clip plane.
Move the camera and update the shader code so that the demo looks nicer.

Primarly the problem is that when cutting we need to enable back lighting, so
that is done. Plus with the way the cutting work it was happening away from
the camera so the camera default position has been changed.
Correct error in name of ShaderProgram.
Better handle deallocation of resources when exiting.
Refactor some common code and properly name some of the clip variables.