Utilise EZConfig's Emacs style syntax for entering the prefix key.
The syntax has been well-established for use in configuration files;
especially in this case it can be a bit awkward having to specify a
function that takes a config just for a single keybinding.
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`.
* Add Emacs-style Prefix handling
* Update CHANGES.md
* Add helper tests for prefix type
* Add docstrings.
* Fix handling of repeated prefix when we fall-back with no binding.
* Add a caveat about nested prefix binding
