Remove background property as it is pushed to mozview

See also: https://github.com/tmeshkova/qtmozembed/pull/85
Merge pull request #190 from rainemak/removeBackgroundProperty

Remove background property as it is pushed to mozview
Bump up spec file version
[sailfish-browser] Allow suspending of videos that do not have audio.
[sailfish-browser] Do not stop rendering when playing a video with an audio