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/SignTile.cpp

@@ -26,7 +26,7 @@ void SignTile::updateDefaultShape()
 
 AABB *SignTile::getAABB(Level *level, int x, int y, int z)
 {
-	return nullptr;
+	return NULL;
 }
 
 AABB *SignTile::getTileAABB(Level *level, int x, int y, int z)
@@ -79,7 +79,7 @@ shared_ptr<TileEntity> SignTile::newTileEntity(Level *level)
 {
 	//try {
 	// 4J Stu - For some reason the newInstance wasn't working right, but doing it like the other TileEntities is fine
-	return std::make_shared<SignTileEntity>();
+	return shared_ptr<TileEntity>( new SignTileEntity() );
 	//return dynamic_pointer_cast<TileEntity>( clas->newInstance() );
 	//} catch (Exception e) {
 	// TODO 4J Stu - Exception handling