Switch delivery search to show all deliveries withing for pickup

Remove searching deliveries by date of delivery as it is no longer the
expected user interaction. Desk workers need, by default, a list of all
deliveries waiting to be picked up.
[fixup] removing delivery show page
[fixup] remove search by date
Raise error when translation is not found

Part of http://robots.thoughtbot.com/foolproof-i18n-setup-in-rails
Add option to show all deliveries on index page

Use a `<select>` input for sorting and filtering params. Sets up a base
for filtering deliveries by deliverer, desk worker and recipient.
Add filtering by deliverer

Use `paraphrase` gem to simplify query logic.
WIP on filtering by recipient and desk worker [ci skip]