Make FeedEx available to all users by default

FeedEx was initially fenced off behind a specific permission
while its usefulness was being tested. Since then, there's been sufficient
uptake of the available features to warrant a wider release.

This change allows anyone with a GOV.UK Signon account to browse
anonymous feedback left on GOV.UK.
Richard Morris and Jake Benilov: Create emergency contact details page and add navigation

Signed-off-by: Ricky Morris <tinsilver@gmail.com>
Richard Morris and Jake Benilov: Create emergency contact details page and add navigation

Signed-off-by: Ricky Morris <tinsilver@gmail.com>
Richard Morris and Jake Benilov: Create emergency contact details page and add navigation

Signed-off-by: Ricky Morris <tinsilver@gmail.com>

Richard Morris and Jake Benilov: Create emergency contact details page and add navigation - remove details

Signed-off-by: Ricky Morris <tinsilver@gmail.com>