 README for bin/macosx/i386/

This is where all dylibs for the Intel Mac OS X go.
But we may limit the minimum MacOSX version.
Typically they are built with:

export CFLAGS="-arch i386 \
   -isysroot /Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.4"
