A few things for us SPI folk:    - specify 'rhel40m64' and 'spinux1' linux platforms to allow us      to build OIIO for different platforms in a single check-out    - a few clean-ups
A few things for us SPI folk:
   - specify 'rhel40m64' and 'spinux1' linux platforms to allow us
     to build OIIO for different platforms in a single check-out
   - a few clean-ups



git-svn-id: c3edda122e248ef33995da003806c930f62b9468@1503 31904243-a364-42ac-a3db-9305396518ba

mcanthony/oiio,scott-wilson/oiio,YangYangTL/oiio,micler/oiio,cwilling/oiio,cwilling/oiio,OpenImageIO/oiio,scott-wilson/oiio,bdeluca/oiio,mcanthony/oiio,OpenImageIO/oiio,YangYangTL/oiio,lgritz/oiio,cwilling/oiio,jeremyselan/oiio,mcanthony/oiio,scott-wilson/oiio,jeremyselan/oiio,YangYangTL/oiio,cwilling/oiio,micler/oiio,micler/oiio,micler/oiio,scott-wilson/oiio,lgritz/oiio,sambler/oiio,sambler/oiio,OpenImageIO/oiio,lgritz/oiio,mcanthony/oiio,bdeluca/oiio,sambler/oiio,jeremyselan/oiio,sambler/oiio,bdeluca/oiio,YangYangTL/oiio,bdeluca/oiio,lgritz/oiio,OpenImageIO/oiio