Set mouse location

[howler]

I was looking through the LUA API today and couldn't spot anything for setting the mouse location. I don't have a need for it right now, but I think it would be a handy addition to the library at some point.

[StarFire]

Thanks for the idea Maybe we could add this to the gui library and/or an input library. Off the top of my head I don't see a need other than in gui but that is not to say there isn't one