LibDraw: Introduce (formerly known as SharedGraphics.)

Instead of LibGUI and WindowServer building their own copies of the drawing
and graphics code, let's it in a separate LibDraw library.

This avoids building the code twice, and will encourage better separation
of concerns. :^)

Demos/Fire/Fire.cpp

@@ -21,7 +21,7 @@
 #include <LibGUI/GPainter.h>
 #include <LibGUI/GWidget.h>
 #include <LibGUI/GWindow.h>
-#include <SharedGraphics/GraphicsBitmap.h>
+#include <LibDraw/GraphicsBitmap.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>