[xmonad] Patch proposal: Save arbitary data per-window

Hello! Thanks for beautiful piece of free software. I want to propose module, allowing saving data in per-window way. I wrote it because I wanted have per-window keyboard layout state, but module is very generic. I did not introduced any new dependencies, but what is policy about dependencies? PS. Please, respond in any way, since I have doubts that this email will arive. -- Best regards, Dmitry Bogatov , Free Software supporter, esperantisto and netiquette guardian. git://kaction.name/rc-files.git GPG: 54B7F00D