Move to gopath dir and introduce new package

src/github.com/microsoft/vscode-remote-try-go/hello/hello.go

@@ -0,0 +1,8 @@
+package hello
+
+import ()
+
+// Hello writes a welcome string
+func Hello() string {
+	return "Hello golang!"
+}

src/github.com/microsoft/vscode-remote-try-go/main/server.go

@@ -7,17 +7,18 @@ package main
 
 import (
 	"fmt"
+	"github.com/microsoft/vscode-remote-try-go/hello"
 	"io"
 	"net/http"
 )
 
-func hello(w http.ResponseWriter, r *http.Request) {
-	io.WriteString(w, "Hello remote world!")
+func helloOld(w http.ResponseWriter, r *http.Request) {
+	io.WriteString(w, hello.Hello())
 }
 
 func main() {
 	portNumber := "9000"
-	http.HandleFunc("/", hello)
+	http.HandleFunc("/", helloOld)
 	fmt.Println("Server listening on port ", portNumber)
 	http.ListenAndServe(":"+portNumber, nil)
 }