Updated SqlAlchemy + the new files

sqlalchemy/event/__init__.py

@@ -0,0 +1,11 @@
+# event/__init__.py
+# Copyright (C) 2005-2017 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: http://www.opensource.org/licenses/mit-license.php
+
+from .api import CANCEL, NO_RETVAL, listen, listens_for, remove, contains
+from .base import Events, dispatcher
+from .attr import RefCollection
+from .legacy import _legacy_signature