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/DoorInfo.cpp

@@ -12,7 +12,7 @@ DoorInfo::DoorInfo(int x, int y, int z, int insideDx, int insideDy, int timeStam
 
 int DoorInfo::distanceTo(int x2, int y2, int z2)
 {
-	return (int) sqrt((float)distanceToSqr(x2, y2, z2));
+	return static_cast<int>(sqrt((float)distanceToSqr(x2, y2, z2)));
 }
 
 int DoorInfo::distanceToSqr(int x2, int y2, int z2)