Display order status next to order on tours page

This includes "delivered" and "loaded".
Rename role "user" to "manager"
Remove unnecessary code
Let user select catchment area for a customer
Move setting of catchment area to SetCatchmentAreaForCustomer interactor
Merge pull request #100 from nubedianGmbH/100-catchment-areas

Customers should be assignable to catchment areas
Add driver selection to tour manager
Add driver name to tours#index
Merge pull request #84 from nubedianGmbH/84-add-driver-to-tour

Add driver to tour
Use BaseMapper#non_whiny_find in CustomerMapper
Update rails to 4.0.2
Use unicorn as production server
Switch to editing tour title when user double clicks on it

Closes #97
Disable "up"/"down" buttons at the end of customers list

Fixes #96
Fix c&p error
Extract SetDriverForTour use case
Add driver to /tours endpoint