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/glWrapper.cpp

@@ -62,7 +62,7 @@ void glOrtho(float left,float right,float bottom,float top,float zNear,float zFa
 
 void glScaled(double x,double y,double z)
 {
-	RenderManager.MatrixScale((float)x,(float)y,(float)z);
+	RenderManager.MatrixScale(static_cast<float>(x),static_cast<float>(y),static_cast<float>(z));
 }
 
 void glGetFloat(int type, FloatBuffer *buff)