Mac OS X patch

[Dietrich Epp]

I made a patch to add non-broken Mac OS X support.

https://bugzilla.icculus.org/show_bug.cgi?id=2715

 From what I've seen of the source, minimum target is 10.3 (because  
of dlopen).  Users will have to install both OpenAL and SDL  
frameworks, if necessary.  The patch only has the Mac OS X client, it  
doesn't yet have the dedicated server or game libraries.

Here are the files changed:

M      code/unix/unix_main.c
A      code/macosx
A      code/macosx/SDLMain.m
A  +   code/macosx/Quake3.icns
A      code/macosx/Quake3.xcodeproj
A      code/macosx/Quake3.xcodeproj/project.pbxproj
A      code/macosx/Quake3-Info.plist
A      code/macosx/SDLMain.h
M      code/qcommon/q_platform.h
M      code/client/qal.h

--Dietrich