Log Message:
Import py27-percol-0.0.3nb20130911 as wip/py-percol.

Percol adds flavor of interactive filtering to the traditional pipe
concept of shell.

Try
   % A | percol | B

and you can display the output of command A and filter it
intaractively then pass them to command B. Interface of percol is
highly inspired by anything.el for Emacs.