more worker names (I should stop creating them some day and make the whole thing completely dynamic…)
ability to define worker concurrency and max-tasks-per-child with sparks_role@hostname or celery_queue@hostname, added to the already existing possibilities.
implement the `remove` command to remove service configuration from workers, and some enhancements to service management (eg. don't try to do anything if service file is not installed).
Ability to pick `roles` like we can already pick hosts. Allow very fine (un-)deployment on a set of already running machines.
Bump version for 3.6
Merge branch 'release/3.6' into develop