Compile with Qt 5.

- QtQuick1 renaming.
- Start on qtconcurrent split (pending renaming of Qt Creator's
  qtconcurrent library).
- QWinEventNotifier is a public class in Qt 5.
- Metatype system: Classes need to be known.

Change-Id: I5582e7cc2777bf791a08b049262217055769c80f
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/libs/cplusplus/cplusplus-lib.pri

@@ -8,6 +8,8 @@ INCLUDEPATH += $$PWD
 
 include(../3rdparty/cplusplus/cplusplus.pri)
 
+greaterThan(QT_MAJOR_VERSION, 4): QT += concurrent
+
 contains(QT, gui) {
 HEADERS += \
     $$PWD/Icons.h \