Fixes async payload passing for #68.

examples/tutorial/async/go/.gitignore

@@ -0,0 +1,6 @@
+vendor/
+/go
+/app
+/__uberscript__
+
+func.yaml

examples/tutorial/async/go/README.md

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+# Aynchronous Function Example
+
+This is an example of an [asynchronous function](/docs/async.md). 
+
+### First, run the following commands:
+
+```sh
+# Initialize your function creating a func.yaml file
+fn init --type async <DOCKERHUB_USERNAME>/hello-go-async
+
+# Test your function. This will run inside a container exactly how it will on the server
+fn run
+
+# Now try with an input
+cat sample.payload.json | fn run
+
+# Deploy your functions to the Oracle Functions server (default localhost:8080)
+# This will create a route to your function as well
+fn deploy myapp
+```
+
+### Now call your function:
+
+```sh
+cat payload.json | fn call myapp hello-go-async
+```
+
+That's it!

examples/tutorial/async/go/func.go

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+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+)
+
+type Person struct {
+	Name string
+}
+
+func main() {
+
+	// b, err := ioutil.ReadAll(os.Stdin)
+	// if err != nil {
+	// 	log.Fatal(err)
+	// }
+	// fmt.Printf("BODY!!! %s", string(b))
+
+	p := &Person{Name: "World"}
+	json.NewDecoder(os.Stdin).Decode(p)
+	fmt.Printf("Hello %v!\n", p.Name)
+
+	log.Println("---> stderr goes to the server logs.")
+}

examples/tutorial/async/go/sample.payload.json

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+{
+    "name": "Johnny"
+}