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/fswatcher/fswatchertest.cpp

@@ -456,7 +456,7 @@ private:
     void TestTrees();
     void TestNoEventsAfterRemove();
 
-    DECLARE_NO_COPY_CLASS(FileSystemWatcherTestCase)
+    wxDECLARE_NO_COPY_CLASS(FileSystemWatcherTestCase);
 };
 
 // the test currently hangs under OS X for some reason and this prevents tests