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/TheEndBiome.cpp

@@ -14,8 +14,8 @@ TheEndBiome::TheEndBiome(int id) : Biome(id)
 	ambientFriendlies.clear();
 
 	enemies.push_back(new MobSpawnerData(eTYPE_ENDERMAN, 10, 4, 4));
-	topMaterial = (byte) Tile::dirt_Id;
-	material = (byte) Tile::dirt_Id;
+	topMaterial = static_cast<byte>(Tile::dirt_Id);
+	material = static_cast<byte>(Tile::dirt_Id);
 
 	decorator = new TheEndBiomeDecorator(this);
 }