Needs a way of running a single test via SBT

[agmenc]

I want to run one tests at a time via the sbt console, and I can't. The only way at the moment is to wrap a specs test around the file to run. I'm considering adding a parameter or something, so that a test-only in sbt can choose between running all PW tests, or just a single.

[agmenc]

Current thinking: ignore sbt, and write a ScalaTest-compatible test runner. The sbt test-interface just wasn't designed for this use-case, and ScalaTest is designed as a pluggable testing framework (maybe a replacement for test-interface?).