anchor.diff:  
   ==== Futures
   
  -As previously explained promises are build on top of *CompletableFutures* of JDK8, _catacumba_ also
  +As previously explained promises are built on top of *CompletableFutures* of JDK8, _catacumba_ also
   supports the raw usage of them:
   
   [source, clojure]
  
positive.code: (>! out {:id "2"})
  ----
  
  NOTE: The _catacumba_'s sse support uses core.async channels, but if you are not
  happy with core.async and want use something different (such as manifold streams), you may want know
  that everything in _catacumba_ is implemented using abstractions and to implement your own sse type
  of handler that uses manifold streams is very easy.
  
  
  === Ring compatibility
  
  Although ring support is not first citizen in _catacumba_, the current design of it allows create an
  handler adapter that follows the ring specification. This is a great example of extensibility of
  _catacumba_.
  
  
negative.code: 
  ----
  
  Let see some examples how you can send other parameters than simple data:
  
  [source, clojure]
  ----
  