Log Message:
Updated to latest release, 0.9.1. Updated HOMEPAGE. Adds py-{six,pbr} as
dependencies. Use python/application.mk to REPLACE_PYTHON in a lot of
files. Works with python3x, supposedly. From Changelog:

CHANGES
=======

0.9.1
-----

* Move patch from oslo to drop unique constraints with sqlite
* Port to Python3
* tests: Replace "self.assert_" by "self.assertTrue"

0.9
---

* turn on testing for sqla 0.9
* Replace AbstractType by TypeEngine
* fix scripttest compat
* Use native quote attribute introduced in sqla 0.9
* Fix genmodel for SQLA 0.9
* Conditionally import ibmdb2/ibm_db_sa
* migrate needs subunit >= 0.0.18
* UniqueConstraint named and escaped twice
* Eradicate trailing whitespace
* Convert tabs to spaces in a couple of rst files

0.8.5
-----

* uncap SQLA in requirements.txt
* Add DB2 10.5 Support
* Sync with global requirements
* Fix broken development version link in README

0.8.2
-----

* Un-break the version in migrate/__init__.py
* Fix the version number to match the last release

0.8.1
-----

* Remove the tag_build line from setup.cfg
* Drop setuptools_git test requirement

0.8
---

* Fix int overflow exception in unittest
* Fix dropping of indexed columns in sqlite/sa08
* Run tests on PostgreSQL and MySQL too
* Update tox requirements
* Stop using the d2to1-based pbr
* decouple index name generation from sqlalchemy version
* Run tests with different SQLAlchemy versions
* Add a workaround for pytz and pip>=1.4
* Add a reqs files for RTFD
* Fix exceptions for SQLAlchemy 0.8
* added bugfixes for 0.8
* Updated to OpenStack Build stuff
* Removed hg and google code references
* Initial changes to import into StackForge
* update changelog
* fix error, Text columns have no width
* fix deprecation warning by using MetaData.reflect
* update credits and changelog
* Import correct exceptions module (Fixes issue 154)
* update changelog and credits
* apply patch for issue #72 by asuffield@gmail.com
* update changelog and credits
* Fix excludeTablesgetDiffOfModelAgainstModel is not passing excludeTables correctly
* start next development iteration
* Added signature for changeset ad06c76fc174