Add missing documentation for QML EnginioClient signals

Session management signals where missing in documentation

Change-Id: If4400f2d5d009927a4c1395a7ca4dc640d6d288e
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Update EnginioClient brief description

Change-Id: I293dd44c46e01299ae0e158e553fc47b21aaeb46
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Change snippets in qml EnginioClient documentation

Now it is more visible that the snippets can not stand on its own

Change-Id: I3799379e833aa88d2f4c1a8bdaa6489f6fdee52a
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Fake EnginioClientConnection properties in QML EnginioClient

Change-Id: If94479f85dfbadb177610d35b35854e89d4842e5
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>