Introduce 'kotlin' script for running programs

'kotlin' is to 'kotlinc' what 'java' is to 'javac'. However it will support
much more: running class by name, jar, scripts, expressions, REPL

compiler/cli/cli-runner/cli-runner.iml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="kotlin-runtime" level="project" />
+  </component>
+</module>