postStuff() {
    var body = "username=myusername&password=mypassword";
    var headers = new Headers();
    headers.append('Content-Type', 'application/x-www-form-urlencoded');
    return this.http.post('http://localhost:8000/rest/', body, { headers: headers })
        .map(res => res.json());
}

curl -H 'Accept: application/json; indent=4' -u myusername:mypassword http://127.0.0.1:8000/rest/

return this.http.get('http://127.0.0.1:8000/users/')
        .map(res => res.json())

return this.http.post('http://127.0.0.1:8000/users/', { headers: headers })
        .map(res => res.json());