Use .gitkeep convention instead of .placeholder

tr0ll :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface:  :trollface: :trollface: