message: Add error handling for applying to the same NPC
diff: @@ -16,6 +16,10 @@ setup.createRelationship = function (town, npc, targetNPC, type, targetType) {
  // return
  // }
  // console.log('Forming a relationship with ' + npc.name + ' and ' + targetNPC.name)
  + if (npc.key === targetNPC.key) {
  + console.error('Tried to make a relationship with the same NPC.')
  + return
  + }
  const npcsToClean = []
  if (npc.relationships[targetNPC.key] && npcs[npc.relationships[targetNPC.key]]) {
  /* npc already had a valid partner; mark it for removal */
  