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/Common/Tutorial/RideEntityTask.h

@@ -13,7 +13,7 @@ protected:
 
 public:
 	RideEntityTask(const int eTYPE, Tutorial *tutorial, int descriptionId,
-		bool enablePreCompletion = false, vector<TutorialConstraint *> *inConstraints = NULL,
+		bool enablePreCompletion = false, vector<TutorialConstraint *> *inConstraints = nullptr,
 		bool bShowMinimumTime = false, bool bAllowFade = true, bool bTaskReminders = true );
 
 	virtual bool isCompleted();