Add API PATCH /users/:user
Add API PUT /users/:user/password
Add models of Project, Team and ProjectTeam
Auto create an owner team when there's no owner team
Remove unnecessary taer
Add tests for Team model
Add User#isOwner method
Add API POST /teams
Disable FOREIGN_KEY_CHECKS before sync
Add API GET /projects
Add Setting Model to store key/value info
Owner can disable signing up