Add two new hazard categories

[AndersonStettner]

Get with Brian before starting work on this issue.

We have a lot of chemicals with the "Health Hazard" designation under Hazards category in the inventory system. Physically, though we have them split into "Organic Health Hazard" and "Inorganic Health Hazard". I think what we would like, in order to have things more consistent with our physical inventory, to add the Primary Hazard categories "Organic Health Hazard" and "Inorganic Health Hazard" as options. They would both continue to have the color blue. Once we get all of the existing chemicals re-categorized to one of those two options, then the generic Health Hazard option could be removed.

[AndersonStettner]

Add two new hazard categories #168