Fixed issue #6 : at() method added as an alias for from() method

Author: me-shaon

src/Jsonq.php

@@ -73,6 +73,18 @@ public function from($node = null)
         return $this;
     }
 
+    /**
+     * Alias of from() method
+     *
+     * @param null $node
+     * @return $this
+     * @throws NullValueException
+     */
+    public function at($node = null)
+    {
+        return $this->from($node);
+    }
+
     /**
      * getting prepared data
      *