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/ProcedureCompoundTask.h

@@ -8,7 +8,7 @@ class ProcedureCompoundTask : public TutorialTask
 {
 public:
 	ProcedureCompoundTask(Tutorial *tutorial )
-		: TutorialTask(tutorial, -1, false, NULL, false,  true, false )
+		: TutorialTask(tutorial, -1, false, nullptr, false,  true, false )
 	{}
 
 	~ProcedureCompoundTask();