Distorted Android

Improve the comment the WAVE effect.

Correct one more issue with computation of WAVE.

Correct one issue with incorrect shadows in WAVE when V.z <0 .

Now we can add up the WAVE effect to others with smooth shading! Remaining issues:

- when angle A < 0, the shades are wrong
- sometimes (check with the 3D vertex & Fragment effects' app) we get black spots at seemingly random points. Looks like computational instability again.

Shades in the WAVE effect fully working, if the effect is the only one.

Remaining: combine the shades with other effects!

Shades of the WAVE effect (almost!) working.

small improvements in DISTORT

Better normals in DISTORT

Vertex positions fully 3D now. Remaining: normals!

Preparation to make the WAVE effect fully 3D