implemented "include" for batch files

al2/batch.py

@@ -35,4 +35,8 @@ def __load_batch_obj(batch_obj):
 
             paths.extend(__load_batch_obj(batch))
 
+    if "include" in batch_obj:
+        for batch_file in batch_obj["include"]:
+            paths.extend(load(pl.Path(instance_dir, batch_file)))
+
     return paths