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/Lighting.cpp

@@ -44,7 +44,7 @@ void Lighting::turnOn()
 
 FloatBuffer *Lighting::getBuffer(double a, double b, double c, double d)
 {
-	return getBuffer((float) a, (float) b, (float) c, (float) d);
+	return getBuffer(static_cast<float>(a), static_cast<float>(b), static_cast<float>(c), static_cast<float>(d));
 }
 
 FloatBuffer *Lighting::getBuffer(float a, float b, float c, float d)