andrestc: add a nice main.go for Gophercon

Change-Id: I119abe576cd50d2592944b5b8c88191fe46b601b
Reviewed-on: https://go-review.googlesource.com/48651
Reviewed-by: Kevin Burke <kev@inburke.com>

andrestc/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("tsuru.io rules a lot!")
+}