add tow fields into reset password page
add test data to Course
add lesson model and related files, change relationship for homework
ignore DS_Store
add basic css
rewrite views for login, register
fix css for before and after login
add en_name in order to add common methods
make page show better, add beautiful css
design constructor of header and fix css for it
add courses users CRUD
add exercise model.
Merge branch 'develop' of https://github.com/wenhuizhao/kecheng into develop
add more info to users list
Merge branch 'develop' of github.com:wenhuizhao/kecheng into develop
make sure there always be a super admin in the database
courses, users, CRUD
use ruby 1.9.3
add capistrano
add utf8