Log Message:
py-alembic: updated to 1.0.0

1.0.0:
[feature] [general] For Alembic 1.0, Python 2.6 / 3.3 support is being dropped, \ 
allowing a fixed setup.py to be built as well as universal wheels. Pull request \ 
courtesy Hugo.

[feature] [general] With the 1.0 release, Alembic’s minimum SQLAlchemy support \ 
version moves to 0.9.0, previously 0.7.9.

[bug] [batch] Fixed issue in batch where dropping a primary key column, then \ 
adding it back under the same name but without the primary_key flag, would not \ 
remove it from the existing PrimaryKeyConstraint. If a new PrimaryKeyConstraint \ 
is added, it is used as-is, as was the case before.