more complete implementation of shmget()
more complete implementation of shmget()

in pv_arch.h
#define USE_SHMGET

#undef USE_SHMGET (default)

git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@5330 7c0444ca-5550-0410-9008-faecdbe78eb5

dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV