Merge pull request #85 from Zangwill/patch-5

修复 Get "https://webpus.../synccheck?... 退出问题

client.go

@@ -54,11 +54,13 @@ func NewClient(client *http.Client) *Client {
 // 设置客户端不自动跳转
 func DefaultClient() *Client {
 	jar, _ := cookiejar.New(nil)
+	timeout := time.Duration(30 * time.Second)
 	client := &http.Client{
 		CheckRedirect: func(req *http.Request, via []*http.Request) error {
 			return http.ErrUseLastResponse
 		},
 		Jar: jar,
+		Timeout: timeout,
 	}
 	c := NewClient(client)
 	c.AddHttpHook(UserAgentHook{})