Allow super admins to debug the raw front page template

Signed-off-by: Bowe Frankema <bowe@presscrew.com>
Add login shortcode

Signed-off-by: Bowe Frankema <bowe@presscrew.com>
Add custom registration form template

Signed-off-by: Bowe Frankema <bowe@presscrew.com>
Update CSS & LESS for new registration form

Signed-off-by: Bowe Frankema <bowe@presscrew.com>
Add Headroom.js

Signed-off-by: Bowe Frankema <bowe@presscrew.com>