[Rxtx] universal binaries for Mac OS X

[Dmitry Markman]

I made the following changes in the CVS:
(2.1)
folder rxtx-devel/MACOSX_IDE/ForPackageMaker/Resources
file RXTX.pre_install was deleted
files preinstall and preupgrade was added

file preinstall and preupgrade handle /var/lock directory
(as SerialImp.h suggests)

folder rxtx-devel/MACOSX_IDE/ForPackageMaker

file RXTX_Tiger.pmproj.sitx.hqx
that file is an installer project (Tiger)

file RXTX_Tiger.pkg.sitx.hqx
this file is an installer itself

I tested that installer on my iMac G5 (10.4.4)
and it worked well

also I tested (very lightly) jnilib and it looks like it works too
but extensive testing is still required
(currently I have just keyspan adapter, but I don't have any device,
so I just tested that rxtx recognizes serial port without errors)

that installer contains universal library
so in theory it should work on intel's Macintosh

Dmitry Markman