Project modernization (#630)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

Minecraft.World/QuartzBlockTile.cpp

@@ -91,7 +91,7 @@ int QuartzBlockTile::getSpawnResourcesAuxValue(int data)
 
 shared_ptr<ItemInstance> QuartzBlockTile::getSilkTouchItemInstance(int data)
 {
-	if (data == TYPE_LINES_X || data == TYPE_LINES_Z) return shared_ptr<ItemInstance>(new ItemInstance(id, 1, TYPE_LINES_Y));
+	if (data == TYPE_LINES_X || data == TYPE_LINES_Z) return std::make_shared<ItemInstance>(id, 1, TYPE_LINES_Y);
 	return Tile::getSilkTouchItemInstance(data);
 }