Add less/scss files to getting started

* Add less/scss files to getting started
* NOTE: This merges into the Release branch
Nit: this lays out basically the same as starting a new `<p>` tag, which seems more semantic.  Any reason not to do that?

Or we could just remove this line -- the content here didn't change, so there may not be a compelling reason to split it into two pieces when one was ok before.