anchor.diff:  that at click 19, the note was sold to the highest bidder (Alice),
   and then at click 20 Alice called the note. Annotated in the 
   description column is the detail indicating the resulting 
  -action: zero faircoin was transferred from Bob to Alice
  +action: zero Faircoin was transferred from Bob to Alice
   since Bob had no cash available at the time of call. Other 
   possible results are partial payment or full payment.
   
  
positive.code: until the future note issue date.
  
  Since Alice knows she is the only bidder, she 
  "low-balls" by making a bid for zero faircoin
  and confirms her entry by listing the bids:
  
  --------------------------------------------
  
negative.code: contract is made between two 'Fairians': a customer (the land-owning
  buyer of a labor contract seeking to employ others) and a 
  supplier (the seller of a labor contract seeking to earn 
  'Faircoin' by working for another 'Fairian').
  
  That more typical, competitive/cooperative arrangement is the topic of a
  later tutorial.
  