Fix C++11 compliance

Fix compiler error when compiling with -std=c++11
 "invalid suffix on literal; C++11 requires a space between literal and
 identifier [-Wreserved-user-defined-literal]"

src/about_imp.h

@@ -69,7 +69,7 @@ class about : public QDialog, private Ui::AboutDlg{
       // Set icons
       logo->setPixmap(QPixmap(QString::fromUtf8(":/Icons/skin/qbittorrent22.png")));
       //Title
-      lb_name->setText(QString::fromUtf8("<b><h1>qBittorrent")+QString::fromUtf8(" "VERSION"</h1></b>"));
+      lb_name->setText(QString::fromUtf8("<b><h1>qBittorrent")+QString::fromUtf8(" " VERSION"</h1></b>"));
       // Thanks
       QString thanks_txt;
       thanks_txt += QString::fromUtf8("<p>I would first like to thank sourceforge.net for hosting qBittorrent project and for their support.</p>");

src/dnsupdater.cpp

@@ -76,7 +76,7 @@ void DNSUpdater::checkPublicIP()
   m_lastIPCheckTime = QDateTime::currentDateTime();
   QNetworkRequest request;
   request.setUrl(QUrl("http://checkip.dyndns.org"));
-  request.setRawHeader("User-Agent", "qBittorrent/"VERSION" chris@qbittorrent.org");
+  request.setRawHeader("User-Agent", "qBittorrent/" VERSION" chris@qbittorrent.org");
   manager->get(request);
 }
 
@@ -123,7 +123,7 @@ void DNSUpdater::updateDNSService()
   m_lastIPCheckTime = QDateTime::currentDateTime();
   QNetworkRequest request;
   request.setUrl(getUpdateUrl());
-  request.setRawHeader("User-Agent", "qBittorrent/"VERSION" chris@qbittorrent.org");
+  request.setRawHeader("User-Agent", "qBittorrent/" VERSION" chris@qbittorrent.org");
   manager->get(request);
 }
 

src/qtlibtorrent/qbtsession.cpp

@@ -421,7 +421,7 @@ void QBtSession::configureSession() {
   }
   // * Session settings
   session_settings sessionSettings = s->settings();
-  sessionSettings.user_agent = "qBittorrent "VERSION;
+  sessionSettings.user_agent = "qBittorrent " VERSION;
   //std::cout << "HTTP user agent is " << sessionSettings.user_agent << std::endl;
   logger->addMessage(tr("HTTP user agent is %1").arg(misc::toQString(sessionSettings.user_agent)));
 

src/torrentcreator/torrentcreatorthread.cpp

@@ -83,7 +83,7 @@ void TorrentCreatorThread::sendProgressSignal(int progress) {
 
 void TorrentCreatorThread::run() {
   emit updateProgress(0);
-  QString creator_str("qBittorrent "VERSION);
+  QString creator_str("qBittorrent " VERSION);
   try {
     file_storage fs;
     // Adding files to the torrent