Merge "Drop Python 2.6 / 3.3 support"

diff --cc docs/build/front.rst
Simple merge

diff --cc setup.py
index 67958296467a5b3836633982876480ad3f130d70,af0c74d2c905dc9ac6c11a4fc9c9634f1f315bb7..3628916288d1ca75015cf0ac69b80a51675c0dbb
--- 1/setup.py
--- 2/setup.py
+++ b/setup.py
@@@ -48,8 -43,9 +43,9 @@@ setup(name='alembic'
        version=VERSION,
        description="A database migration tool for SQLAlchemy.",
        long_description=open(readme).read(),
+       python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
        classifiers=[
 -          'Development Status :: 4 - Beta',
 +          'Development Status :: 5 - Stable',
            'Environment :: Console',
            'Intended Audience :: Developers',
            'Programming Language :: Python',