Modifications to allow the data type for weights to be changed from float to unsigned byte (for example).
Modifications to allow the data type for weights to be changed from float to unsigned byte (for example).

git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@8415 7c0444ca-5550-0410-9008-faecdbe78eb5

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