BUG: Add vega namespace in libobjMesh and liblighting

src/liblighting/lighting.cpp

src/liblighting/lighting.h

src/libobjMesh/objMeshOctree.cpp

src/libobjMesh/objMeshOctree.h

src/libobjMesh/objMeshOffsetVoxels.cpp

src/libobjMesh/objMeshOffsetVoxels.h

src/libobjMesh/objMeshRender.cpp

src/libobjMesh/objMeshRender.h

src/libobjMesh/octree.cpp

src/libobjMesh/octree.h

src/libobjMesh/triangle.cpp

src/libobjMesh/triangle.h