func IsDevAppServer() bool {
	return internal.IsDevAppServer()
}
IsDevAppServer reports whether the App Engine app is running in the
development App Server.
package appengine  
import (
	"net/http"
	"github.com/golang/protobuf/proto"
	"golang.org/x/net/context"
	"google.golang.org/appengine/internal"
)
func Main() {
	internal.Main()
}