Update pytest to 3.4.2

remove the db. by using the alias

Update sqlalchemy to 1.2.4

Update isort to 4.3.4

Update flake8-debugger to 3.1.0

Update psycopg2 to 2.7.4

Update werkzeug to 0.14.1

Update isort to 4.3.1

Update pytest to 3.4.0

package.json: specify engines with node>=4

close #257

Update factory-boy to 2.10.0

Update sqlalchemy to 1.2.2

Update sqlalchemy to 1.2.1

Update pep8-naming to 0.5.0

Update sqlalchemy to 1.2.0

Update flake8-isort to 2.3

Update flake8-quotes to 0.13.0

Update werkzeug to 0.13

Update pytest to 3.3.1