Support for cropped circles

[daboth]

Hello everyone. I lack the power to describe this topic, but you know the trend where every app takes your image and crops a circle from it? Yes, this looks bad with the native pagan output and will surely take some workaround if you consider pagan as a tool in an automated process. So i'm open for suggestions here. The first thing i could think of would be to just generate a bigger "outer space" around the actual image, but i'd like to reach out for a better, more "standalone too" option to cover this case.