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/LookControl.cpp

@@ -47,8 +47,8 @@ void LookControl::tick()
 		double zd = wantedZ - mob->z;
 		double sd = sqrt(xd * xd + zd * zd);
 
-		float yRotD = (float) (atan2(zd, xd) * 180 / PI) - 90;
-		float xRotD = (float) -(atan2(yd, sd) * 180 / PI);
+		float yRotD = static_cast<float>(atan2(zd, xd) * 180 / PI) - 90;
+		float xRotD = static_cast<float>(-(atan2(yd, sd) * 180 / PI));
 		mob->xRot = rotlerp(mob->xRot, xRotD, xMax);
 		mob->yHeadRot = rotlerp(mob->yHeadRot, yRotD, yMax);
 	}