adding in kotlin example

Author: Ian Eyberg

kotlin/README.md

@@ -0,0 +1,14 @@
+Kotlin Hello World
+==================
+
+Compile your kotlin application:
+
+```
+./kotlinc-native hello.kt -o hello
+```
+
+Run it:
+
+```sh
+$ ops run hello.kexe
+```

kotlin/hello.kt

@@ -0,0 +1,3 @@
+fun main() {
+  println("Hello Kotlin/Native!")
+}