Go 언어의 goouth2를 표준 공식의 oauth2로 변경

import

import "code.google.com/p/goauth2/oauth/jwt"

import "golang.org/x/net/context"
import "golang.org/x/oauth2/jwt"

http.인증서 가져오기

token := jwt.NewToken(email, scope, pem)
transport, err := jwt.NewTransport(token)
if err != nil {
	return err
}
client := transport.Client()

cfg := jwt.Config{
	Email:      email,
	PrivateKey: pem,
	Scopes:     []string{scope},
	TokenURL:   tokenURL,
}
ctx := context.Background()
client := cfg.Client(ctx)