Downgrade SQLAlchemy to 1.3.0
Downgrade SQLAlchemy to 1.3.0

This maintains compatibility with the DATABASE_URL environment variable, 
which is provided by Heroku as postgres:// rather than postgresql:// as 
req'd by SQLAlchemy 1.4.0.

mjec/rc-niceties,mjec/rc-niceties,mjec/rc-niceties