First quicksort version

although the tutorial did not have a class or object definition,
which is necessary according to sbt ...   hmmm.

scala/official-by-example/setup

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+mkdir -p ./bin
+pushd ./bin
+curl -O 'https://raw.github.com/paulp/sbt-extras/master/sbt'
+chmod +x sbt
+popd
+./bin/sbt -sbt-create about