% [Phooey](http://haskell.org/haskellwiki/Phooey) To Do

+ Even out the stretching between sub-layouts.  I nest binary layout
  operators, and I think the stretch space is divided in two each time.
  Look for *associative* layout operators.  I may have to make my own
  layout data type that holds lists of layouts, so I can append them.
  Right now, I just make rows, columns, boxed, and widget (with fill), so
  the data type could reflect those tools.

+ Consider rewriting `Phooey.Monad` to use mtl-style operations instead of
  working on `UI'`.