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/EnchantTableRenderer.cpp

@@ -28,7 +28,7 @@ void EnchantTableRenderer::render(shared_ptr<TileEntity> _table, double x, doubl
 #endif
 
 	glPushMatrix();
-	glTranslatef((float) x + 0.5f, (float) y + 12 / 16.0f, (float) z + 0.5f);
+	glTranslatef(static_cast<float>(x) + 0.5f, static_cast<float>(y) + 12 / 16.0f, static_cast<float>(z) + 0.5f);
 
 	float tt = table->time + a;