FB Connect modal; put create and connect existing account all in the same modal

The old version of FB connect displayed a modal when users choose to login via the user menu.  This modal allowed them to create a new account, or click a button that would take them to a sign in page.  Rather than split the experience, put create and sign-in in the same modal.

https://wikia-inc.atlassian.net/browse/UC-111
There's no recorded convention in our style guide, but the direct member access method is what's used in all our code currently when setting individual output variables.  The only time setData is used is when the data being returned is already a data structure, e.g.:
```php
$data = getUserData();
$this->response->setData( $data );
```
I don't really have an opinion either way but I would like to keep it consistent.  Why don't you bring it up with the team and ask for their input?