The arbitrator has to specify them manually. Otherwise, we cannot know
when a turn is complete and thus we cannot determine if solos can/should
be applied.
It is mostly working, but many things are still missing.
In particular:
- ability to enter (or change) moves for a past turn
- ability to change the rack (manually, or randomly)
- ability to add/remove players during the game
- support for solos, warnings, penalties
- support for table number
- more ergonomic interface
- non regression tests
- ... and probably bugs to fix
