I recently took part in a Scala development task for ACME. I spent about a few hours over a weekend in mid November on it. I completed the task in Scala 2.11 and against the popular Drop Wizard IO project. It you are interested you can go and review the ACME Server project on Github and let me know what you think.
Bonus question: How does one create an efficient ZIP task in SBT e.g. (build.sbt)?