Set cover image

Setting a cover image

This does three things:

1. Adds the image file to the epub
2. generates a leading page as a cover representation in the book
3. marks the image as the cover image in the EPUB meta section for ebook readers

General Usage

The command is intentionally derived from the markdown syntax to include images:

![cover](path/cover.jpg "Cover image")

cover is the internal identifier for spell to add this image as a cover image and generate the cover page.

path/cover.jpg is the relative path to the image to be used as cover.

Cover image is optional and currently unused. You can use it for your own reference.