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/WoodTile.cpp

@@ -21,7 +21,7 @@ const wstring WoodTile::TEXTURE_NAMES[] = {L"oak", L"spruce", L"birch", L"jungle
 
 WoodTile::WoodTile(int id) : Tile(id, Material::wood)
 {
-	icons = NULL;
+	icons = nullptr;
 }
 
 unsigned int WoodTile::getDescriptionId(int iData)