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.

tests/misc/selstoretest.cpp

@@ -61,7 +61,7 @@ private:
 
     wxSelectionStore *m_store;
 
-    DECLARE_NO_COPY_CLASS(SelStoreTestCase)
+    wxDECLARE_NO_COPY_CLASS(SelStoreTestCase);
 };
 
 // register in the unnamed registry so that these tests are run by default