Log Message:
Update jwm to 2.1.0.

Changes from 2.0.1 (per http://joewing.net/programs/jwm/history.shtml )

JWM v2.1.0 <> 20110925
 * Revision 502
 * Fixed several window handling issues.
 * Fixed an issue with key bindings and modifiers.
 * Added some more key bindings.
 * Changed the way the "next" and "nextstacked" key bindings \ 
behave.
 * Merged some user-contributed patches.
  * Rounded window corners (Patriot).
  * Support for transparent menus, trays, and windows (Patriot).
  * New borders for buttons (Patriot).
  * User-replaceable window button masks (Patriot).
  * gxine fullscreen fix (Patriot).
  * Fix for windows loosing focus when switching desktops (Patriot).
  * More key bindings (Dougal).
  * Transparent group (Dougal).
 * Some code cleanups.
 * Added the ability to resize from the top of windows.
 * Added support for pager labels.