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/CompoundContainer.cpp

@@ -6,8 +6,8 @@
 CompoundContainer::CompoundContainer(int name, shared_ptr<Container> c1, shared_ptr<Container> c2)
 {
 	this->name = name;
-	if (c1 == NULL) c1 = c2;
-	if (c2 == NULL) c2 = c1;
+	if (c1 == nullptr) c1 = c2;
+	if (c2 == nullptr) c2 = c1;
 	this->c1 = c1;
 	this->c2 = c2;
 }