mv curl to curlMulti

@@ -35,7 +35,7 @@ class Concurrent
      *
      * @return Http\CurlMulti
      */
-    static public function curl()
+    static public function curlMulti()
     {
         return new Http\CurlMulti();
     }

+#Hood Docs
+## CURL Concurrent
+```php
+    use Hood\Concurrent;
+    $CurlMulti = Concurrent::curlMulti();
+    $CurlMulti->call('http://www.baidu.com',function ($curl_info, $curl_data, $callback_data) {
+        print_r($curl_info);
+    }, 1)->call('http://www.sogou.com',function ($curl_info, $curl_data, $callback_data) {
+        print_r($curl_info);
+    }, 2)->finish();
+    
+    
+    $CurlMulti = Concurrent::curlMulti();
+    $CurlMulti->callRest('http://www.qin.com/index/demo', 'get', function ($curl_info, $curl_data, $callback_data) {
+        print_r($curl_data);
+    }, array('a' => 1))->finish();
+```
\ No newline at end of file