Fix compilation with Qt5.5

3rdparty/qtsingleapplication/qtlocalpeer.cpp

@@ -41,6 +41,7 @@
 #include "qtlocalpeer.h"
 #include <QCoreApplication>
 #include <QTime>
+#include <QDataStream>
 #include <unistd.h>
 
 #if defined(Q_OS_WIN)

3rdparty/vreen/vreen/src/api/attachment.cpp

@@ -25,6 +25,7 @@
 #include "attachment.h"
 #include <QSharedData>
 #include <QStringList>
+#include <QDataStream>
 
 namespace Vreen {
 

3rdparty/vreen/vreen/src/api/newsitem.cpp

@@ -28,6 +28,7 @@
 #include <QSharedData>
 #include <QStringList>
 #include <QDateTime>
+#include <QDataStream>
 
 namespace Vreen {
 

ext/libclementine-common/core/messagehandler.cpp

@@ -23,6 +23,7 @@
 
 #include <QAbstractSocket>
 #include <QLocalSocket>
+#include <QDataStream>
 
 _MessageHandlerBase::_MessageHandlerBase(QIODevice* device, QObject* parent)
     : QObject(parent),