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/TakeAnimationParticle.cpp

@@ -64,7 +64,7 @@ void TakeAnimationParticle::render(Tesselator *t, float a, float xa, float ya, f
     zz-=zOff;
         
     
-    EntityRenderDispatcher::instance->render(item, (float)xx, (float)yy, (float)zz, item->yRot, a);
+    EntityRenderDispatcher::instance->render(item, static_cast<float>(xx), static_cast<float>(yy), static_cast<float>(zz), item->yRot, a);
 
 }