Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.World/SandStoneTile.cpp

@@ -14,9 +14,9 @@ int SandStoneTile::SANDSTONE_NAMES[SANDSTONE_BLOCK_NAMES] = {
 
 SandStoneTile::SandStoneTile(int id) : Tile(id, Material::stone)
 {
-	icons = nullptr;
-	iconTop = nullptr;
-	iconBottom = nullptr;
+	icons = NULL;
+	iconTop = NULL;
+	iconBottom = NULL;
 }
 
 Icon *SandStoneTile::getTexture(int face, int data)