lihaoyi/hands-on-scala-js — pull request #3 by jducoeur (2014-11-24 18:41:01+00:00)
Title: Suggested pointer to Activator

Novice Scala users are likely to be using Typesafe Activator; they may not be sensitive to the fact that that's basically a thin shell around sbt and works fine for purposes of this book. I'd suggest mentioning that.