new params for SiblingConn
new params for SiblingConn

git-svn-id: http://svn.code.sf.net/p/petavision/code/sandbox@4708 7c0444ca-5550-0410-9008-faecdbe78eb5

Former-commit-id: 8b80069bb3e0ef166d18a42e65438852e2b4a7c5
dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV