Libraries: Create top level directory for libraries.

Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.

Libraries/LibGUI/GFrame.cpp

@@ -0,0 +1,22 @@
+#include <LibGUI/GFrame.h>
+#include <LibGUI/GPainter.h>
+#include <SharedGraphics/StylePainter.h>
+
+GFrame::GFrame(GWidget* parent)
+    : GWidget(parent)
+{
+}
+
+GFrame::~GFrame()
+{
+}
+
+void GFrame::paint_event(GPaintEvent& event)
+{
+    if (m_shape == FrameShape::NoFrame)
+        return;
+
+    GPainter painter(*this);
+    painter.add_clip_rect(event.rect());
+    StylePainter::paint_frame(painter, rect(), m_shape, m_shadow, m_thickness, spans_entire_window_horizontally());
+}