Updated QtMultimedia declarative module to version 5.0

The QtMultimedia module should have version 5.0 to align with
Qt 5 in general. This change updates the version, but keeps
4.0 versions of the elements for compatability purposes.

Documentation and examples has also been updated to reflect
this version change.

Change-Id: Ica10c1a5ecc2c7233192a65e04ff77eb33a77e30
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/imports/multimedia/qdeclarativeaudio.cpp

@@ -52,11 +52,11 @@ QT_BEGIN_NAMESPACE
 
     \ingroup qml-multimedia
 
-    This element is part of the \bold{QtMultimedia 4.0} module.
+    This element is part of the \bold{QtMultimedia 5.0} module.
 
     \qml
-    import Qt 4.7
-    import QtMultimedia 4.0
+    import QtQuick 2.0
+    import QtMultimedia 5.0
 
     Text {
         text: "Click Me!";