### Problem to solve In order to generate better newsletters in less time, they should be based on the RSS feed. To enable this, the author name and an image thumbnail must be added to the RSS feeds. ### Further details This is solved by adding the necessary code to the fluid template for the News extension's RSS feed and introducing the necessary `RssEnclosureImageViewHelper`, based on the Core's `ImageViewHelper` to render the enclosure tag with file size and mime type info.