Upgrade of draw-commands + a new draw-command calling conversion of a shape into voxels.
Resolved of a problem of failure of non-regression tests on voxels (vis/bug19820).
Implemented a new method using separating axis theorem to compute triangle-box intersection. Based on the intersection result the decision whether to set the voxel is made.
Adjustment of lines (removal of extra-spaces).
Adding test cases for voxel testing