Make the base 1-N relations with some models.
Merge pull request #1 from skylershin/develop

Make the base 1-N relations with some models.
fix commit
Customizing devise registrations controller and revise route codes. And change password's validation condition.
Merge pull request #2 from skylershin/master

Now our server enable sign_up.
Revise README.md for explain how to use this API
Revise README.md for explain how to use this API
Now enable Sign in. TODO : Revise return value.
fix README.md
Merge pull request #3 from skylershin/master

Third request