Provide a simple visual front end for XRandR 1.2, client
side X only (no xorg.conf involved, no pre-1.2 options).

Features

* Allow setting the primary output
* Full control over positioning (instead of plain "left of") with
edge snapping
* Saving configurations as executable shell scripts (configurations
can be loaded without using this program)
* Configuration files can be edited to include additional payload
(like xsetwacom commands tablet PC users need when rotating), which
is preserved when editing
* Metacity keybinding integration:
* Saved configurations can be bound to arbitrary keys via metacity
custom commands.
* Several layouts can be bound to one key; they are cycled
through. (Useful for "rotate" buttons on tablet PCs.)
* Main widget separated from packaged application (to facilitate
integration with existing solutions)