Merge pull request #11 from binwiederhier/ls-fix

Fix ls() call caching when called multiple times in a row!

Author: joostfaassen

src/Client.php

@@ -365,6 +365,9 @@ public function listDir($key = '/', $recursive = false)
      */
     public function ls($key = '/', $recursive = false)
     {
+        $this->values = array();
+        $this->dirs = array();
+
         try {
             $data = $this->listDir($key, $recursive);
         } catch (EtcdException $e) {