When signing up and having multiple email addresses, not the primary one is used

[localheinz]

When signing up while having multiple email addresses at GitHub, not the primary one is used but the first one returned.

I have signed up, but email@example.com is not my primary email address (it's an example, of course).

{
    "data":
    [
        {
            "user_id": 99999,
            "username": null,
            "email": "email@example.com",
            "display_name":"Andreas Möller",
            "password": "githubToLocalUser",
            "photo_url": null,
            "created_at": "2014-12-06 19:16:03",
            "state": null
        }
    ]
}

Blocked by hybridauth/hybridauth#360.

[localheinz]

Related to #251.