fix crash at worldgen when adding rjw artifical techhediffs/parts to royalty, assume they are happy with their implants and new life

split rape checks in WorkGiver_Rape to show JobFailReason if target cant be raped or rapist cant rape

clean up of xxx
fixed error in can_get_raped check when toberaped is set to 0

changed Hediff_PartBase into Hediff_PartBaseNatural, implants changed to Hediff_PartBaseArtifical, so purists/transhumansts should be satisfied

some other fixes

added horse to equine race group

added tech and categories tag for implants
set archotech reward rate to RewardStandardHighFreq
set archotech deterioration rate to 0, like other archo stuff