Doc: add source for Transitions example

Change-Id: I20e477be4cad782dac3946f18c3067a45579388e
Reviewed-on: http://codereview.qt.nokia.com/3816
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

doc/examples/transitions/main.cpp

@@ -0,0 +1,14 @@
+#include <QtGui/QApplication>
+#include "qmlapplicationviewer.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QmlApplicationViewer viewer;
+    viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);
+    viewer.setMainQmlFile(QLatin1String("qml/Transitions/main.qml"));
+    viewer.showExpanded();
+
+    return app.exec();
+}