patch applied (packages/base): new Control.Compositor module

[Ashley Yakeley]

Sat Oct 13 00:48:51 PDT 2007  Ashley Yakeley <ashley at semantic.org>
  * new Control.Compositor module
  
  The Compositor class is a superclass of Arrow.

    M ./Control/Applicative.hs -1 +2
    M ./Control/Arrow.hs -14 +12
    A ./Control/Compositor.hs
    M ./base.cabal +1