Add commit on teardown.

accountant/__init__.py

@@ -25,6 +25,7 @@ app = Flask(__name__, static_folder=None)
 app.config.from_pyfile('config.cfg')
 
 app.config['SQLALCHEMY_ECHO'] = app.debug
+app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True
 
 db = SQLAlchemy(app)