* rename it.
 * use strong tag for error info.
Merge branch 'master' of git@github.com:xirang/chanzhieps
 + add static property to common::getSysURL() method.
 * change the openid table to oauth.
 * adjust the oauth methods names.
 * rewrite the oauth feature.
Merge branch 'master' of git@github.com:xirang/chanzhieps