added provision to read in rand_seed in HyPerCol.  Still needs to be made MPI compliant so that mpi runs with the same seed will produce identical results. rand_seed can also be passed on command line.
added provision to read in rand_seed in HyPerCol.  Still needs to be made MPI compliant
so that mpi runs with the same seed will produce identical results.
rand_seed can also be passed on command line.

git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@2971 7c0444ca-5550-0410-9008-faecdbe78eb5

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