xmonad: minor style changes
xmonad: improve pretty keys

* prettyKeys now uses keysymToString for default case
* prettyBindings -> prettyBindingsIndented
* prettyBindingsCL -> prettyBindingsFlatHex
* added prettyBindingsFlat
xmonad[Bindings] cleanup/style
xmonad[Bindings] fix workspace names in binding caches
Merge pull request #3 from bacchanalia/moige

Moige