Culling, rendering improvements and optimizations, block removing test.

Program.cs

@@ -8,12 +8,15 @@ internal class Program
         int sizeY = 600;
         string title = "Game";
 
+        Window window = new Window(sizeX, sizeY, title);
+
         Chunk chunk = new Chunk(0, 0);
 
-        var faces = chunk.GetFaces();
-        Renderer.AddFaces(faces);
+        ChunkMesh chunkMesh = chunk.GetChunkMesh();
+        Renderer.AddFaces(chunkMesh.Faces);
+
+        window.Chunk = chunk;
 
-        Window window = new Window(sizeX, sizeY, title);
         window.Run();
     }
 }