Ability to save better quality jpegs out of engine.

[danni.coy]

Currently there is no control over the quality of jpegs in unigine (well that I am aware of anyways). We do a lot of rendering to frames we would use jpeg if we could get a better quality out of it as this would significantly decrease time and disk space spent capturing.

[frustum]

Second argument of Image::save() will be a quality parameter with default value 0.85f.