parse kotlin scripts

http://confluence.jetbrains.net/display/~stepan.koltsov/REPL

compiler/testData/psi/script/ComplexScript.ktscript

@@ -0,0 +1,12 @@
+fun die(message: String) {
+    System.err.println(message)
+    System.exit(1)
+}
+
+if (args.length == 0) {
+    die("Need arguments")
+}
+
+for (arg in args) {
+    println(arg)
+}