Mac OS X work...lots of little changes that touch a lot of random places.

Still work to be done, but this at least matches the PowerPC Linux status
 now.

MacOS-specific directory (and XCode project) is gone...this now uses SDL,
 OpenAL, and the Unix Makefiles.

--ryan.

code/unix/linux_glimp.c

@@ -1265,7 +1265,9 @@ static void GLW_InitExtensions( void )
 
       if ( qglActiveTextureARB )
       {
-        qglGetIntegerv( GL_MAX_ACTIVE_TEXTURES_ARB, &glConfig.maxActiveTextures );
+        GLint glint = 0;
+        qglGetIntegerv( GL_MAX_ACTIVE_TEXTURES_ARB, &glint );
+        glConfig.maxActiveTextures = (int) glint;
 
         if ( glConfig.maxActiveTextures > 1 )
         {