[compiz] [Request]Shortcuts to move a window to another viewport with plane plugin

[Fabien Chaillou]

Hello,
i switched from using rotate+cube to plane as i like it better ( No more 
headaches caused by cube spinnings ! ).
But i noticed that it is not possible to move a window to another 
viewport using the keyboard  and i miss it quite a lot.

So i thought it was a good idea to ask for it here.
i don't really have time right now to do it myself but i'll give it a 
try sometime later if no one has time to do this or more important stuff 
are done.

Thanx for any feedback anyway :)

Fabien