Partially fixed calculating of normals in Marching Cubes kernel
Fixed off-by-one error in Marching Cubes kernel

It caused the last three vertices of computed mesh to be placed
incorrectly in the origin of coordinate system.
Unified kernel invocation routines.

Running on single card is in fact running on multiple cards with
CommandQueue length of size 1.
SimpleBlob test now renders two blobs and outputs avr file with mesh.