add answer api integration specs

Closes #1

LGTM given by: @marten

Squashed commit of the following:

commit 1404bd48a53e34a9f9e3a1f470335ebfe9e1a575
Author: Samuel Esposito <s.esposito@roqua.nl>
Date:   Wed Jun 25 12:01:10 2014 +0200

    update appraisal gem files

commit cc7940e1e1495283f3a271a2990f259389f05fc5
Author: Samuel Esposito <s.esposito@roqua.nl>
Date:   Wed Jun 25 11:58:17 2014 +0200

    update quby

commit b3be2a54b9af0d649e5fbd0fc069e77f711e1487
Author: Samuel Esposito <s.esposito@roqua.nl>
Date:   Wed Jun 25 11:44:41 2014 +0200

    add answer api integration specs