execution_on_gallows - main activation tag

Working more or less consistently:
gallows_pillar_presence
gallows_beam_presence
gallows_frame_presence

All:
gallows_pillar_presence gallows_pillar_absence
gallows_beam_presence gallows_beam_absence
gallows_frame_presence gallows_frame_absence
big_gallows_platform_presence big_gallows_platform_absence
small_gallows_platform_presence small_gallows_platform_absence
gallows_dropzone_above_presence gallows_dropzone_above_absence
gallows_dropzone_below_presence gallows_dropzone_below_absence
gallows_dropzone_front_presence gallows_dropzone_front_absence