Add ES2015 runtime transpilation sample

samples/misc/ES2015Transpilation/Controllers/ScriptController.cs

@@ -0,0 +1,19 @@
+using System.Threading.Tasks;
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.NodeServices;
+
+namespace ES2015Example.Controllers
+{
+    public class ScriptController : Controller
+    {
+        private static NodeInstance nodeInstance = new NodeInstance(); 
+        
+        public async Task<ContentResult> Transpile(string filename)
+        {
+            // TODO: Don't hard-code wwwroot; use proper path conversions
+            var fileContents = System.IO.File.ReadAllText("wwwroot/" + filename);
+            var transpiledResult = await nodeInstance.Invoke("transpilation.js", fileContents);
+            return Content(transpiledResult, "application/javascript");
+        }
+    }
+}