jwilder: add hello command

Change-Id: I7231a0ea50d9de8db5f165148903208dbf8b2228
Reviewed-on: https://go-review.googlesource.com/48725
Reviewed-by: Han-Wen Nienhuys <hanwen@google.com>

jwilder/main.go

@@ -0,0 +1,11 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello from Denver & Gophercon!")
+}