[xmonad] darcs patch: X.A.DynamicWorkspaces fix doc and add behaviour

[Adam Vogt]

* On Friday, November 13 2009, Anders Engstrom wrote:

>Sat Nov 14 00:39:03 CET 2009  Anders Engstrom <ankaan at gmail.com>
>  * X.A.DynamicWorkspaces fix doc and add behaviour
>  Before this patch the documentation claims that it won't do anything on non-empty workspaces when it actually does. This patch fixes the documentation to reflect the actual behaviour, but also adds the behaviour promised by the documentation in other functions. It does not break configs. In addition it also provides functions to help removing empty workspaces when leaving them.

Applied, thanks!