Merge pull request #270 from amagdas/feature-workflow

rename basket to stage
SAVEPOINT
feature(workflow) - add default stage for a desk
feature(default stage) -address review comments
Merge pull request #274 from amagdas/default-stage

feature(workflow) - add default stage for a desk
feature(default stage) - implement missing features: mark default stage as such, default name and prohibit deleting of a default stage if the desk still exists.
feat(default stage) - when assigning a task to a desk, fill in the 'stage' to 'incoming_stage'
Merge pull request #278 from amagdas/stage-completion

feature(default stage) - implement missing features: mark default stage ...