Styleguide Class Name Documentation

[erwstout]

Hey there, so I noticed there are classes used to render things correctly when the styelguide is generated, such as .sg and .styleguide-color but I only discovered them while doing some digging into the demo. Is there a list of all the classes available for the user markup? If so it's not easily found.

If there isn't, it may be a good idea to include that in the readme somewhere.

Thanks!