refs #316 Changed blackcore to use CLogMessage to emit messages.

Also changed functions which always returned CStatusMessageList containing a single CStatusMessage,
to return CStatusMessage instead for simplicity.

src/blackcore/context_application.h

@@ -66,6 +66,9 @@ namespace BlackCore
             ActionStops
         };
 
+        //! Log message category
+        static QString getMessageCategory() { return "swift.context.application"; }
+
         //! Service name
         static const QString &InterfaceName()
         {