This is the first release of Beep Edition for D8. I've based it on Stable, and included all of the template files for easy reference and modification (only some have been modified from core where needed).
I've pulled out the layout.css file in the base theme and child theme so you can prevent the load of the layout.css file from the base if you're adding your own. If you want to load the base theme layout AND your own, just change the name of the layout.css file you want to load in the child theme and both will be included.
I've made a lot of changes to the base CSS, included icon fonts, version of Modernizr and the Starterkit, so it seemed worth it to call this a new release. I figure that way people will be cautious about updating an existing installation.