qt5.5 diff

--- a/src/qtsingleapplication/qtlocalpeer.cpp	2015-07-07 12:47:14.000000000 -0700
+++ b/src/qtsingleapplication/qtlocalpeer.cpp	2015-05-11 06:31:59.000000000 -0700
@@ -42,6 +42,7 @@
 #include "qtlocalpeer.h"
 #include <QCoreApplication>
 #include <QTime>
+#include <QDataStream>

 #if defined(Q_OS_WIN)
 #include <QLibrary>