add create user_info function when social login
add social request test
add user_token
changed social login process
rewrite user social login(70%)
removed user_info related files
finished social login (lack test)
improved social login
add omniauth callback controller's test
add weibo login
added weibo login and improved coding style
re-add 'bypass: true' to omniauth controller
finished 3 social login's spec
Merge pull request #1 from st0012/user_test

add user_social && omniauth controller and it's test