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.Client/Windows64/Network/WinsockNetLayer.h

@@ -66,7 +66,7 @@ public:
 	static bool Initialize();
 	static void Shutdown();
 
-	static bool HostGame(int port, const char* bindIp = NULL);
+	static bool HostGame(int port, const char* bindIp = nullptr);
 	static bool JoinGame(const char* ip, int port);
 
 	static bool SendToSmallId(BYTE targetSmallId, const void* data, int dataSize);