North Forge:Hazard/Implementation notes

• hazard data structure as per North Forge:Hazard
• make the hazard ?classification? template hat generates the dropdows to use in the hazard populting form
• find the pictographs for the things John flagged and add them
• Form:Hazard
• update Template:tool
  • to list its hazards, and those of its SDSs
  • to change how SDSs are encoded
• update Template:room to list its hazards, and those from tools in it, and those of their SDSs
• update or make Template:SDS to list its hazards
• update North Forge:Job Hazard Analysis with query