Doc: Improved example documentation

-added instructions on how to run the example
 (using \include to insert a section from qtbase/doc/global/)
-updated copyright year
-removed links to Qt 4 API
-rearranged some of the sections
-created links from the example pages to Qt Multimedia
-fixed QDoc warnings related to the example pages

Task-number: QTBUG-33597
Change-Id: Id45ce5cbd40dbfa384abd7260a316f6f6837c186
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>

examples/multimediawidgets/player/doc/src/player.qdoc

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** This file is part of the documentation of the Qt Toolkit.
@@ -34,6 +34,8 @@
     This example creates a simple multimedia player. We can play audio and
     or video files using various codecs.
 
+    \include examples-run.qdocinc
+
     The example uses a QMediaPlayer object passed into a QVideoWidget to
     control the video output. To give the application playlist capability
     we also use a QPlayList object.
@@ -93,4 +95,3 @@
     \endcode
 
 */
-