Use wx-prefixed macros throughout the repository.

Change {DECLARE,IMPLEMENT}_*CLASS and {DECLARE,BEGIN,END}_EVENT_TABLE
occurrences to use the wx-prefixed version of the macros.

include/wx/gtk/glcanvas.h

@@ -104,7 +104,7 @@ public:
 #endif // WXWIN_COMPATIBILITY_2_8
 
 private:
-    DECLARE_CLASS(wxGLCanvas)
+    wxDECLARE_CLASS(wxGLCanvas);
 };
 
 #endif // _WX_GLCANVAS_H_