Social is_email_verified

I came up with this last week but, did not issue a pull request because I was not finished testing. in this solution I am not just testing for verified email, but capturing it and adding to email_addresses.

This allows for example: the responding email addresses of an invitation to be used as verified.  I am also working on a new setting for making a third party verified email primary,

Take a look and let me know what u think.  This is not ready for a pull yet.