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/BasicTypeContainers.cpp

@@ -18,5 +18,5 @@ const double Double::MIN_NORMAL = DBL_MIN;
 
 int Integer::parseInt(wstring &str, int radix /* = 10*/)
 {
-	return wcstol( str.c_str(), NULL, radix );
+	return wcstol( str.c_str(), nullptr, radix );
 }