retrieve/place orders for logged in user
fix controller
fix bug: anonymous user not logged in by default
resolve runtime warning
permit normal users to access protocol viewer
use constants instead of strings, remove comments
add constants
use constants
use constants
remove unused code
add new users to user group
use constants, prevent identifier clashes (global unique constraint)
allow access to studydatarequest for logged in users
use UUID as identifier to prevent identifier clash
Merge pull request #278 from dennishendriksen/master

Solve catalogue authorization issues + code improvements