new table 	hird_party_user and related DB operations added
new table third_party_user and related DB operations added
Merge branch 'master' of https://github.com/hippasus/ohlala
add sina & google provider at a very basic level
auto log user in if binded user found by using third party to login
rename and fix typo for file third_party_user.go
make sina to get token by authorization code separately due to sina return token json string in text/plain http content type
redirect user to /user/bind to do manually user binding if not binded yet nor matched email found after oauth2callback
使用第三方账户登录流程走通
rename oauth_config.go to third_party_config.go
sina get user id & email fixed
Merge pull request #25 from hippasus/master

使用第三方账户登录