Huge skylight optimizations. Also fixed the submodules.

src/helpers/entities.cpp

@@ -363,7 +363,7 @@ void DrawEntities(float dt) {
             DrawCube(pos_lerped, 1, 1, 1, RED);
         }
         if(ent.type == 4) {
-            DrawCubeBlock(terrain, pos_lerped, 1,1,1, BLOCKS[ent.data[1]]);
+            DrawCubeBlock(terrain, pos_lerped, 1,1,1, GetBlockDefinition(ent.data[1]));
         }
     }
 }