Minor update and question

Hi Daniel,

It works really well indeed! The only issue that I ran into so far is that under Linux (but not Windows) there is no image when using the legacy (window and fullscreen) or xpyriment (fullscreen only) back-ends, I suspect that this has something to do with the `pygame_handler`, right?

It would be great to include this by default, but ... Gstreamer is really large! My Windows `gstreamer-sdk` folder weighs in at 335 MB, so including it would make OpenSesame about four times as large. I suspect that a lot of it is unnecessary though. Perhaps you could try to strip down the Gstreamer folder to its minimum, and we can then decide whether its small enough to include by default?

Great work!

Cheers,
Sebastiaan