Allow Admin access to all user-dependent data

[ruists]

[ruists]

Check if this is actually needed. If so, acf1285 added a middleware to differenciate between admins and regular users.

[ruists]

Since ownership needs to be checked when modifying data, might as well give some control to admins as well, at least while testing.

[ruists]

#8 has been closed, but the functionality can still be extended to allow admin accounts to access and control user data just so it makes it easier to test everything.