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/Durango/Network/DQRNetworkManager.h

@@ -221,7 +221,7 @@ public:
 	class SessionSearchResult
 	{
 	public:
-		SessionSearchResult() { m_extData = NULL; }
+		SessionSearchResult() { m_extData = nullptr; }
 		~SessionSearchResult() { free(m_extData); }
 		wstring			m_partyId;
 		wstring			m_sessionName;