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/ThinFenceTile.cpp

@@ -5,7 +5,7 @@
 
 ThinFenceTile::ThinFenceTile(int id, const wstring &tex, const wstring &edgeTex, Material *material, bool dropsResources) : Tile(id, material,isSolidRender())
 {
-	iconSide = NULL;
+	iconSide = nullptr;
 	edgeTexture = edgeTex;
 	this->dropsResources = dropsResources;
 	this->texture = tex;
@@ -144,7 +144,7 @@ bool ThinFenceTile::isSilkTouchable()
 
 shared_ptr<ItemInstance> ThinFenceTile::getSilkTouchItemInstance(int data)
 {
-	return shared_ptr<ItemInstance>(new ItemInstance(id, 1, data));
+	return std::make_shared<ItemInstance>(id, 1, data);
 }
 
 void ThinFenceTile::registerIcons(IconRegister *iconRegister)