Create an orga phonebook

[lukegb]

Because there are no migrations, it would be tricky to add a new column in production. In lieu of adding a new bit to phone numbers to indicate whether they should be on an orga phonebook, create a new permission which, when present on a phone number, will cause it to be highlighted on the public phonebook and (if published) also present on the orga phonebook.

Fixes #27

[sammachin]

This is nice feature, although it does mean hard coding a permission which isn't ideal in terms of keeping flexibility in the sytem. Also it shows the phonebook as a separate page and I htink Jonty's request was for the flagged numbers to be at the top or highlighted in some way on the main phonebook

[sammachin]

oh wait it does highlight them on the main phonebook too with a class