I've written up an appdata file for revelation so it can be part of gnome-software in a more complete manner. Please find it attached. I'm going to update the Fedora package to include this file sometime this week so that it's picked up by gnome-software for Fedora 20.
It'll be great if this file can be included in future releases, and optionally, if the build system could install it to /usr/share/appdata. The installation isn't necessary, since us maintainers can do it manually too.
Please feel free to edit the file to improve the descriptions, add more screenshots etc. The screenshots must be 16:9 in aspect ratio though. Here's a post explaining how to make such screenshots: http://blogs.gnome.org/hughsie/2013/10/08/how-to-take-169-screenshots/
More information on appdata files: http://people.freedesktop.org/~hughsient/appdata/