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/ComparatorTileEntity.cpp

@@ -27,7 +27,7 @@ void ComparatorTileEntity::setOutputSignal(int value)
 // 4J Added
 shared_ptr<TileEntity> ComparatorTileEntity::clone()
 {
-	shared_ptr<ComparatorTileEntity> result = shared_ptr<ComparatorTileEntity>( new ComparatorTileEntity() );
+	shared_ptr<ComparatorTileEntity> result = std::make_shared<ComparatorTileEntity>();
 	TileEntity::clone(result);
 
 	result->output = output;