1. fixed wxGTK notebook which was completely broken by the merge

2. added a new file for commno notebook code (nbkbase.cpp)
3. removed 'include "wx/wx.h"' from html files as I got tired of
   recompiling them


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10793 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/helpctrl.cpp

@@ -20,12 +20,14 @@
 #pragma hdrstop
 #endif
 
-#include "wx/defs.h"
-
 #if wxUSE_HTML && wxUSE_STREAMS
 
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+    #include "wx/intl.h"
+#endif // WX_PRECOMP
+
 #include "wx/html/helpctrl.h"
-#include "wx/wx.h"
 #include "wx/busyinfo.h"
 
 #if wxUSE_HELP