Provide fallback for missing `name` value.
Provide fallback for missing `name` value.

If `auth.info.name` is `nil`, then use `auth.info.first_name + auth.info.last_name`
as the value of `name`.
8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr,8thcolor/eurucamp2014-htdsadr,8thcolor/eurucamp2014-htdsadr,8thcolor/rubyconfau2015-sadr,8thcolor/rubyconfau2015-sadr