Added common EncodeURLValues function.

common.go

@@ -16,6 +16,7 @@ import (
 	"log"
 	"math"
 	"net/http"
+	"net/url"
 	"strings"
 )
 
@@ -259,3 +260,11 @@ func JSONDecode(data []byte, to interface{}) error {
 
 	return nil
 }
+
+func EncodeURLValues(url string, values url.Values) string {
+	path := url
+	if len(values) > 0 {
+		path += "?" + values.Encode()
+	}
+	return path
+}