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/HugeMushroomTile.cpp

@@ -9,9 +9,9 @@ const wstring HugeMushroomTile::TEXTURE_TYPE[] = {L"skin_brown", L"skin_red"};
 HugeMushroomTile::HugeMushroomTile(int id, Material *material, int type) : Tile(id, material)
 {
 	this->type = type;
-	icons = NULL;
-	iconStem = NULL;
-	iconInside = NULL;
+	icons = nullptr;
+	iconStem = nullptr;
+	iconInside = nullptr;
 }
 
 Icon *HugeMushroomTile::getTexture(int face, int data)