* Only picked value allowed (nargs = ?)
* Default is 'all', not handled by argparse

* Change name, so to not collide with --conf
* Fix test for values

* There is a '--force' flag to force it

* Add a default config file
* It is possible to point to a new config in the CLI

* Add basic operations
* Not full tested

* Have configuration of blocks working
* Have basic deals with deviceserver working