* 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* Select has been replaced by the new statically typed Choose combinator,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