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/Pos.cpp

@@ -28,13 +28,13 @@ Pos::Pos(Pos *position)
 bool Pos::equals(void *other)
 {
 	// TODO 4J Stu I cannot do a dynamic_cast from a void pointer
-	// If I cast it to a Pos then do a dynamic_cast will it still return NULL if it wasn't originally a Pos?
-	if (!( dynamic_cast<Pos *>( (Pos *)other ) != NULL ))
+	// If I cast it to a Pos then do a dynamic_cast will it still return nullptr if it wasn't originally a Pos?
+	if (!( dynamic_cast<Pos *>( static_cast<Pos *>(other) ) != nullptr ))
 	{
 		return false;
 	}
 
-	Pos *p = (Pos *) other;
+	Pos *p = static_cast<Pos *>(other);
 	return x == p->x && y == p->y && z == p->z;
 }