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`.
* Added a XMonad.Util.Image module to manipulate simple images
and show them into an X drawable
* Added the possibility of using image buttons instead of plain
text buttons into the title bar
* Added a XMonad.Layout.ImageButtonDecoration as an example of
how to use the image buttons
