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.

src/common/helpbase.cpp

@@ -22,6 +22,6 @@
 
 #include "wx/helpbase.h"
 
-IMPLEMENT_CLASS(wxHelpControllerBase, wxObject)
+wxIMPLEMENT_CLASS(wxHelpControllerBase, wxObject);
 
 #endif // wxUSE_HELP