MacOS Classic support.

[Ryan C. Gordon]

MacOS 8/9 support has hit CVS. It seems to work well enough, with one
exception. I need to make aliases work like symlinks. Currently, they
aren't treated differently at all, so they show up in directory
enumerations and you can PHYSFS_delete() them, but reading and writing
them succeeds but doesn't actual do anything. I'd say they're better off
emulating symlinks.

Everything else, including CD-ROM enumeration, seems to work with the
test_physfs program.

Anyhow, if anyone wants to look, pull the latest from CVS and download this:
   http://icculus.org/physfs/downloads/mac_classic_support.sit

That has CodeWarrior 6 project files and the source to zlib 1.1.4 (so you
can use zipfiles).

Once I handle aliases correctly, I'm going to package this up as an
official 0.1.5 release.

--ryan.