#32 `autopromote` field for the `promotion_level`
#32 `autopromote` defaults to `false`
#32 Autopromotion buttons
#32 Autopromotion AJAX call
#32 Autopromotion service layer
#32 Autopromotion GUI improvments
#32 Autopromotion flag on the promotion level list
#32 Autopromotion