xmonad: Added configs and docs

* Added XMonad section to readme which specifies the installation of
  custom infoboard configuration.
* Added custom xmonad configuration scripts to `misc/xmonad`

Signed-off-by: mr.Shu <mr@shu.io>
Merge branch 'qml' of github.com:fmfi-svt/infoboard into mrshu/install-xmonad

Signed-off-by: mr.Shu <mr@shu.io>

Conflicts:
	README.md
Merge pull request #11 from fmfi-svt/mrshu/install-xmonad

xmonad: Added configs and docs