Update sqlalchemy to 1.1.13

Update factory-boy to 2.9.2

Update pytest to 3.2.1

Update psycopg2 to 2.7.3.1

Update flake8-isort to 2.2.2

Update webtest to 2.0.28

Update flake8 to 3.4.1

Update flask-migrate to 2.1.0

Update psycopg2 to 2.7.3

Update psycopg2 to 2.7.2

Update pytest to 3.1.3

replace bower with npm and Flask-Assets with webpack

Update sqlalchemy to 1.1.11

This reverts commit d39db511.