add setting Environment Variable for oauth in README.md
create omniauth's initializer
create session controller
add helper method to check session enable/disable
insert in members when login by omniauth-github
add session controller route
update sessions route
EOFの改行は変更の必要がないためmasterにあわせる
add signin and signout link for test
update one tab to double spaces
Merge branch 'login-oauth-github' of https://github.com/yochiyochirb/kajaeru into login-oauth-github
add blank line.
[WIP]test for login
format indent
modify current_user methods's return value & signed_in? method's nil check
move unless to before_action
rename before_action's method name
add github Developer applications setting in README.md
user can login only in members talbe.
modify url to path