[SDL] Cocoa window menus in 1.3

[Sam Lantinga]

> It's mainly because I was tired of these discussions that I decided to 
> try to provide a prototype implementation, so that people could see for 
> themselves whether they find it useful or not, instead of me failing to 
> explain it over and over again. And, of course, to see if what I have in 
> mind works at all, before I'm too much of a loudmouth about it. 
> Unfortunately, that thing was quite low on my priority list for a long 
> time, and the question now is: if I hurry up now, is there any chance to 
> get this into SDL 1.3 (provided that people, and ultimately you, agree 
> once they see it)?

Sure!

There's plenty of work left to be done on 1.3 before a preliminary release.

See ya,
	-Sam Lantinga, Senior Software Engineer, Blizzard Entertainment