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/EnderChestTile.cpp

@@ -65,7 +65,7 @@ bool EnderChestTile::use(Level *level, int x, int y, int z, shared_ptr<Player> p
 {
 	shared_ptr<PlayerEnderChestContainer> container = player->getEnderChestInventory();
 	shared_ptr<EnderChestTileEntity> enderChest = dynamic_pointer_cast<EnderChestTileEntity>(level->getTileEntity(x, y, z));
-	if (container == NULL || enderChest == NULL) return true;
+	if (container == nullptr || enderChest == nullptr) return true;
 
 	if (level->isSolidBlockingTile(x, y + 1, z)) return true;
 
@@ -82,7 +82,7 @@ bool EnderChestTile::use(Level *level, int x, int y, int z, shared_ptr<Player> p
 
 shared_ptr<TileEntity> EnderChestTile::newTileEntity(Level *level)
 {
-	return shared_ptr<EnderChestTileEntity>(new EnderChestTileEntity());
+	return std::make_shared<EnderChestTileEntity>();
 }
 
 void EnderChestTile::animateTick(Level *level, int xt, int yt, int zt, Random *random)