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/window.h

@@ -1872,9 +1872,9 @@ private:
     unsigned int m_freezeCount;
 
 
-    DECLARE_ABSTRACT_CLASS(wxWindowBase)
+    wxDECLARE_ABSTRACT_CLASS(wxWindowBase);
     wxDECLARE_NO_COPY_CLASS(wxWindowBase);
-    DECLARE_EVENT_TABLE()
+    wxDECLARE_EVENT_TABLE();
 };