update patient login docs
Closes #13

LGTM given by: @marten

Squashed commit of the following:

commit 91141c735bec6218943cdfd985dc95e9afdbfa99
Author: Samuel Esposito <s.esposito@roqua.nl>
Date:   Mon Nov 17 10:41:04 2014 +0100

    update patient login docs

commit c4fb7abefb3e752fc5392d15af0ebaebed2e88f5
Author: Samuel Esposito <s.esposito@roqua.nl>
Date:   Thu Nov 13 17:35:37 2014 +0100

    add progress url docs