Feature Request: Flip Images

[artofwalls]

I find the zoom and rotate options very useful but one thing I miss very much is an option to flip an image (actually two options: Flip vertically and Flip horizontally).

I'm a graphic designer and most of the time I'm looking for reference images. Sometimes I see a reference that could fit what I need if I flip the image. Now I have to download the image, flip it in Photoshop and then I can see if it really is what I need or not. If I could just flip the image on the fly before downloading, that would be great.

This also could be useful to see correctly images that are already flipped, of course.

Can this be added to the extension?