Adding a simple JUnit console for testing

Use the basic JUnit console provided in JUnit5 to
use as a sample for running Jupiter engines.

junit-console

@@ -0,0 +1,3 @@
+#!/bin/bash
+./gradlew :jupiter-sample-console:installDist --quiet
+./jupiter-sample-console/build/install/jupiter-sample-console/bin/jupiter-sample-console $*

junit-console.cmd

@@ -0,0 +1,3 @@
+@echo off
+cmd /c gradlew :jupiter-sample-console:installDist --quiet
+cmd /c jupiter-sample-console\build\install\jupiter-sample-console\bin\jupiter-sample-console %*

jupiter-sample-console/build.gradle

@@ -0,0 +1,11 @@
+plugins {
+    id 'application'
+    id 'maven-publish'
+}
+
+mainClassName = 'org.junit.gen5.console.ConsoleRunner'
+
+dependencies {
+    compile 'org.junit:junit-console:default'
+    compile project(':jupiter-engine-clojure.test')
+}

settings.gradle

@@ -7,5 +7,5 @@ include 'jupiter-engine-clojure.test'
 // build/ide launchers
 include 'jupiter-launcher-gradle'
 
-// test fixtures
-include 'jupiter-launcher-sample'
+// samples
+include 'jupiter-sample-console'