Merge pull request #10 from DevelopmentPractice201405/sign-up

Finish user signup
Merge pull request #11 from DevelopmentPractice201405/sign-in-out

Sign in out
5syou_ensyuu
Merge pull request #12 from DevelopmentPractice201405/5syou_ensyuu

5syou_ensyuu
6syou_ensyuu
Merge pull request #13 from DevelopmentPractice201405/6syou_ensyuu

6syou_ensyuu
7syou_ensyuu
Merge pull request #14 from DevelopmentPractice201405/7syou_ensyuu

7syou_ensyuu
Merge pull request #15 from DevelopmentPractice201405/updating-users

Finish user edit, update, index, and destroy actions
10syou
update
Update README.md
Update README.md
Merge pull request #17 from DevelopmentPractice201405/modify-readme

Update README.md
resolv conflict