New features to GammaGallery

Hi guys,


While the library itself it is very good, I've added a few new features to it on my branch that I needed:
- Be able to view the full image (in order to make zoom) when you click on the image (configurable)
- Add a FULL IMAGE button in the right side which redirect to the high resolution image available (configurable)
- Swap the close with the playback button, and move the close button to the right side.

If you want you can merge these in the mail branch.

Thanks,
Daniel