anchor.diff:  The reactive streams has four participants, but in the clojure part we only need one: the Publisher.
   
   
  -==== First contact
  +=== First contact
   
   The _futura_'s streams api is really very simple. It consists in ver few functions.
   
  
positive.code: ----
  
  
  ==== Atomic Boolean
  
  This is a specialized version of Atomic Reference that is higtly optimized for boolean values. It
  has the same operations and implements the same abstractions that previously explained atomic ref.
  
negative.code: - `rejected`: means thet the promise contains an error.
  
  
  === Creating a promise.
  
  It there several different ways to create a promise in _futura_ library. You can create it inmediatelly
  resolved with initial value, inmediatelly rejected with some exception.
  