anchor.diff:  	agree			= sanitize_integer(agree, -1, 65535, 0)
   	donor_pda		= sanitize_integer(agree, 1, donor_pdas.len, 1)
   	donor_hat		= sanitize_integer(agree, 1, donor_start_items.len, 1)
  +	purrbation 		= sanitize_integer(purrbation, 0, 1, initial(purrbation))
   
   	return 1
   
  
positive.code: 	S["undershirt"]			>> undershirt
  	S["socks"]				>> socks
  	S["backbag"]			>> backbag
  	S["purrbation"]			>> purrbation
  	S["feature_mcolor"]					>> features["mcolor"]
  	S["feature_lizard_tail"]			>> features["tail_lizard"]
  	S["feature_lizard_snout"]			>> features["snout"]
  
negative.code: 	S["agree"] 				>> agree
  	S["donor_pda"]			>> donor_pda
  	S["donor_hat"]			>> donor_hat
  	S["purrbation"]         >> purrbation
  
  	//try to fix any outdated data if necessary
  	if(needs_update >= 0)
  