View lcov test coverage results on http://www.ufoot.org/liquidwar/v6/doc/coverage/src/lib/vox/index.html.
game_state: the game state to use
Creates a voxel rendering object (todo, not implemented yet).
Return value: renderer object
renderer: the renderer object
Frees a voxel rendering object (todo, not implemented yet).
Return value: none
mode: test mode (bitmask)
Registers all tests for the libvox module.
Return value: 1 if test is successfull, 0 on error.