Update requirements.txt

At the Step 3 : Create an administrator user
    (venv) $ python manage.py adduser --admin <your-email-address> <your-username>
 
There is a bug in "SQLAlchemy==0.9.3" when it use "Python-3.4.0",it should update to "SQLAlchemy==0.9.4".You can see "http://stackoverflow.com/questions/22481905/sqlalchemy-python-3-default-column-value" for details.Thank you!