Subtype creation tutorial

[kernelmethod]

Subtype creation is one of the areas of XML modding where modders have quite a bit of latitude. I've already updated the genotypes/subtypes modding page with some of the attributes supported by the <subtype> tag; it'd be nice if we also had a little tutorial on creating a new subtype using these attributes. Some topics to cover (which aren't covered currently by the genotype tutorial) might be modding the player body a bit more, e.g. assigning a custom anatomy.