[xmonad] YAML x config. files

[Don Stewart]

lanek:
> Hi,
> 
> Why not to use YAML, YAML Ain't a Markup Language, with XMonad's configuration
> files? ... Don't faint, there is no need to use full blown YAML.

Functions. You can't encode Haskell functions in YAML.

However, if we ignore arbitrary computable functions, all the value
level configuration could be YAML, or JSON, or Read/Show or ...

See xmonad-light for non-function values only.

-- Don