Remove submodule, just put Dependencies in ./libs

libs/migrate/changeset/__init__.py

@@ -0,0 +1,28 @@
+"""
+   This module extends SQLAlchemy and provides additional DDL [#]_
+   support.
+
+   .. [#] SQL Data Definition Language
+"""
+import re
+import warnings
+
+import sqlalchemy
+from sqlalchemy import __version__ as _sa_version
+
+warnings.simplefilter('always', DeprecationWarning)
+
+_sa_version = tuple(int(re.match("\d+", x).group(0)) for x in _sa_version.split("."))
+SQLA_06 = _sa_version >= (0, 6)
+
+del re
+del _sa_version
+
+from migrate.changeset.schema import *
+from migrate.changeset.constraint import *
+
+sqlalchemy.schema.Table.__bases__ += (ChangesetTable, )
+sqlalchemy.schema.Column.__bases__ += (ChangesetColumn, )
+sqlalchemy.schema.Index.__bases__ += (ChangesetIndex, )
+
+sqlalchemy.schema.DefaultClause.__bases__ += (ChangesetDefaultClause, )