This node shows how to use coroutines together with the 
connect/input/disconnect events to build session based
interactions for telnet connections.

How to test: 
 * Start info-beamer

   $ ../../info-beamer .

 * Telnet to localhost:4444 and connect to this 
   parrot node.

   $ telnet localhost 4444
   Info Beamer ... Select your channel!
   parrot
   ok!
   I will repeat everything you send me
   hello
   hello

Image source: 
http://openclipart.org/detail/164251/blue-macaw-by-luchapress
