Add bootstrap css.
Merge branch 'master' of https://github.com/Software-Craftsmanship-Group-Shanghai/ci-team-one
Merge branch 'master' of https://github.com/Software-Craftsmanship-Group-Shanghai/ci-team-one
Add bootstrap to register page.
Fix #1.
Merge branch 'master' of https://github.com/Software-Craftsmanship-Group-Shanghai/ci-team-one