add director to Role
give more clear description to docstring in Work
define mapped classes for Franchise and World
test on Franchise and Wolrd
add migration script for World and Franchise
Merge pull request #32 from sjw0687/world_and_franchise

Define mapped classes, World and Franchise.
immigration
documentation
additional documentation and test
test loader()
app-> flask_app, added celery_app
flake8
flake8
Documentation, and change name of variables 'p' to 'property_'
unify docstring
loader test enabled and change 'cliche load' to 'cliche sync'
use Info field lists to describe function `select_by_relation`