This one does NOT update:

helloworld.go

//  This is the app handler for running the helloworld Site on Google App Engine
package helloworld

import (
	"net/http"

	_ "io"
	_ "io/ioutil"
	_ "log"
	_ "sort"
	_ "sync"
	_ "time"

	// _ "github.com/metaleap/go-util"
	// _ "github.com/metaleap/go-util/hash"
	// _ "github.com/metaleap/go-util/gfx"
	// _ "github.com/metaleap/go-util/io"
	_ "github.com/metaleap/go-util/net"
	_ "github.com/metaleap/go-util/num" // UN-COMMENTED!
	// _ "github.com/metaleap/go-util/slice"
	// _ "github.com/metaleap/go-util/slice/sort"
	// _ "github.com/metaleap/go-util/str"

	_ "github.com/goforks/toml"
	_ "github.com/gorilla/context"
	_ "github.com/gorilla/mux"

	leansite "github.com/metaleap/go-leansite"
)

func init() {
	leansite.Init("")
	http.Handle("/", leansite.Router)
}