This is a massive update, here's what has changed:

* Read is no longer a superclass of Layout
 * All of the core layouts have moved to the new Layouts.hs module
 * Select has been replaced by the new statically typed Choose combinator,
   which is heavily based on David Roundy's NewSelect proposal for
   XMonadContrib.  Consequently:
    - Rather than a list of choosable layouts, we use the ||| combinator to
      combine several layouts into a single switchable layout
    - We've lost the capability to JumpToLayout and PrevLayout.  Both can be
      added with some effort

tests/Properties.hs

@@ -3,7 +3,6 @@ module Properties where
 
 import StackSet hiding (filter)
 import qualified StackSet as S (filter)
-import Operations (tile)
 
 import Debug.Trace
 import Data.Word