WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/slic3r/GUI/AboutDialog.hpp

@@ -0,0 +1,36 @@
+#ifndef slic3r_GUI_AboutDialog_hpp_
+#define slic3r_GUI_AboutDialog_hpp_
+
+#include "GUI.hpp"
+
+#include <wx/wx.h>
+#include <wx/intl.h>
+#include <wx/html/htmlwin.h>
+
+namespace Slic3r { 
+namespace GUI {
+
+class AboutDialogLogo : public wxPanel
+{
+public:
+    AboutDialogLogo(wxWindow* parent);
+    
+private:
+    wxBitmap logo;
+    void onRepaint(wxEvent &event);
+};
+
+class AboutDialog : public wxDialog
+{
+public:
+    AboutDialog();
+    
+private:
+    void onLinkClicked(wxHtmlLinkEvent &event);
+    void onCloseDialog(wxEvent &);
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif