Add Quick Player example

This is a simplified Qt Quick-based version of the Music Player example.

Change-Id: Ica9da1b388ccbc4d22ae0dccecb8fbd2b270522a
Reviewed-by: Ivan Vizir <define-true-false@yandex.com>
Reviewed-by: Caroline Chao <caroline.chao@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>