Add XRC handler for wxSimplebook.

Similar to wxNotebook but even simpler as wxSimplebook doesn't use images.

Also add wxSimplebook::Create() as the version inherited from wxBookCtrlBase
didn't _quite_ work: we need to add wxBK_TOP style to prevent asserts due to
unknown alignment in the base class when creating wxSimplebook.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@77007 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/simplebook.h

@@ -43,8 +43,7 @@ public:
     /**
         Default constructor.
 
-        Use Create() (inherited from the base class) later to really create the
-        control.
+        Use Create() later to really create the control.
     */
     wxSimplebook();
 
@@ -58,6 +57,18 @@ public:
                  long style = 0,
                  const wxString& name = wxEmptyString);
 
+    /**
+        Really create the window of an object created using default
+        constructor.
+
+        @since 3.0.2
+     */
+    bool Create(wxWindow* parent,
+                wxWindowID id = wxID_ANY,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = 0,
+                const wxString& name = wxEmptyString);
 
     /**
         Set the effects to use for showing and hiding the pages.