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/TextureHolder.cpp

@@ -22,12 +22,12 @@ Texture *TextureHolder::getTexture()
 
 int TextureHolder::getWidth() const
 {
-	return rotated ? smallestFittingMinTexel((int) (height * scale)) : smallestFittingMinTexel((int) (width * scale));
+	return rotated ? smallestFittingMinTexel(static_cast<int>(height * scale)) : smallestFittingMinTexel(static_cast<int>(width * scale));
 }
 
 int TextureHolder::getHeight() const
 {
-	return rotated ? smallestFittingMinTexel((int) (width * scale)) : smallestFittingMinTexel((int) (height * scale));
+	return rotated ? smallestFittingMinTexel(static_cast<int>(width * scale)) : smallestFittingMinTexel(static_cast<int>(height * scale));
 }
 
 void TextureHolder::rotate()
@@ -52,7 +52,7 @@ void TextureHolder::setForcedScale(int targetSize)
 		return;
 	}
 
-	scale = (float) targetSize / min(width, height);
+	scale = static_cast<float>(targetSize) / min(width, height);
 }
 
 //@Override