define Character and add relationships of it
define custom uuid type used in SQLAlchemy
avoid using backref for relationship
migration script for Character and WorkCharacter
Merge pull request #56 from sjw0687/character

Add character to ontology database schema
add missing __all__ element
Merge pull request #57 from sjw0687/uuid

Define custom uuid type used in SQLAlchemy
initial commit about social login using flask-oauthlib
make test