Support import on Medium

[martinschneider]

I cross-post selected content from my personal blog on Medium.

Medium has a convenient import feature. However, it's unable to import any images displayed by the gallery plugin. I assume it's due to the fact that they are dynamically loaded. The problem is that Medium doesn't allow editing of imported posts, so there's no way of adding the images later.

I'm not sure whether this is feasible to fix.