Hook everything up to run the GUI on top of the kernel.

Okay things kinda sorta work. Both Bochs and QEMU now boot into GUI mode.
There's a ton of stuff that doesn't make sense and so many things to rework.

Still it's quite cool to have made it this far. :^)

Widgets/Button.cpp

@@ -1,6 +1,5 @@
 #include "Button.h"
 #include "Painter.h"
-#include <cstdio>
 
 Button::Button(Widget* parent)
     : Widget(parent)
@@ -15,7 +14,7 @@ void Button::setCaption(String&& caption)
 {
     if (caption == m_caption)
         return;
-    m_caption = std::move(caption);
+    m_caption = move(caption);
     update();
 }