(k)ubuntu 10.04+ notification support (based on @zwierzak his code)

src/qt/bitcoingui.h

@@ -11,6 +11,7 @@ class TransactionView;
 class OverviewPage;
 class AddressBookPage;
 class SendCoinsDialog;
+class Notificator;
 
 QT_BEGIN_NAMESPACE
 class QLabel;
@@ -77,6 +78,7 @@ private:
     QAction *changePassphraseAction;
 
     QSystemTrayIcon *trayIcon;
+    Notificator *notificator;
     TransactionView *transactionView;
 
     QMovie *syncIconMovie;