anchor.diff:  
   In order to enable Afterglow to send feedback about cue status to the
   lights on the nanoKontrol I needed to use the Korg Kontrol Editor to
  -set its LED Mode to _External_ (as shipped, they were in Internal
  +set its LED Mode to _External_ (as shipped, they were in _Internal_
   mode, and lit themselves when held down). Most MIDI controllers are
   likely to need similar configuration to work as feedback-capable cue
   controllers with Afterglow, but most I have seen do offer
  
positive.code: 
  The
  http://deepsymmetry.org/afterglow/doc/afterglow.effects.cues.html[afterglow.effects.cues]
  namespace provides functions for creating cues.
  
  TODO: Describe the functions and arguments, link to effect examples.
  
  [[controlling-cues]]
  Controlling Cues
  
negative.code: namespace defines some helpful functions for working with cues, and
  defines a
  http://deepsymmetry.org/afterglow/doc/afterglow.controllers.html#var-IGridController[grid
  controller protocol] which rich controller mappings, like the one for
  the
  http://deepsymmetry.org/afterglow/doc/afterglow.controllers.ableton-push.html[Ableton
  Push], use to attach themselves to a running show, and synchronize
  with the web interface.
  
  TODO: Flesh out, discuss individual functions.
  