This is a convenience module in order to have less import noise. It
re-exports the following:
a) Commonly used modules in full (Data.Foldable, Data.Applicative, and
so on); though only those that play nicely with each other, so that
XMonad.Prelude can be imported unqualified without any problems.
This prevents things like `Prelude.(.)` and `Control.Category.(.)`
fighting with each other.
b) Helper functions that don't necessarily fit in any other module;
e.g., the often used abbreviation `fi = fromIntegral`.
It is now possible to get "live" status updates while the gesture handler
is running. I use this in my xmonad.hs to print the current gesture to my
status bar. Because collecting movements is now the callback's job, the
implementation of mouseGestureH got quite a bit simpler. The interface is
incompatible with the previous mouseGestureH but the old mouseGesture
function works as before.
