This commit adds basic support for adding, deleting, ... locations. This
needed a bit of rework for the ResourceName, as it was kind of stupid to
have different implementations server internally and in the lib.
There is still some need for cleanup, but it works basically.
The basic server and client are working and it is possible to add, list,
show, set and remove subjects.
Locations are not yet written to the filesystem yet and need to be
fixed.
