[physfs] 7z/lzma in trunk

[Ryan C. Gordon]

> I hope this makes it's way into SVN soon. :)

Great, I'll look at this ASAP. Thanks for taking the time to do this!

Sorry for the lack of updates on my end to physfs, everyone...There're 
several good patches that have been queued up in my inbox for way too 
long. Also, I'm working on something that (I think) will be an 
interesting addition to PhysicsFS, but isn't ready yet. Hopefully all of 
this will be hitting svn fairly soon.

--ryan.