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/CritParticle2.cpp

@@ -11,12 +11,12 @@ void CritParticle2::_init(double xa, double ya, double za, float scale)
 	yd += ya * 0.4;
 	zd += za * 0.4;
 
-	rCol = gCol = bCol = (float) (Math::random() * 0.3f + 0.6f);
+	rCol = gCol = bCol = static_cast<float>(Math::random() * 0.3f + 0.6f);
 	size *= 0.75f;
 	size *= scale;
 	oSize = size;
 
-	lifetime = (int) (6 / (Math::random() * 0.8 + 0.6));
+	lifetime = static_cast<int>(6 / (Math::random() * 0.8 + 0.6));
 	lifetime *= scale;
 	noPhysics = false;