[SDL] FAQ update

[Ryan C. Gordon]

> Q: What's up with SDL 2.0? Can I help?
> A: SDL 1.3 is in development and when it matures it will become SDL 
> 2.0. You can download a PRERELEASE version of the code from the SDL 
> subversion page and provide feedback on the mailing list.

It might be worth noting that the svn trunk is 1.3 ... I wonder if there 
are people downloading it that think the trunk is progressing to 1.2.14...

--ryan.