Update PETSc to 3.6.4 per libMesh/MOOSE installation instructions
Update PETSc to 3.6.4 per libMesh/MOOSE installation instructions

ORNL-CEES/DataTransferKit,Rombur/DataTransferKit,Rombur/DataTransferKit,dalg24/DataTransferKit,Rombur/DataTransferKit,ORNL-CEES/DataTransferKit,amccaskey/DataTransferKit,Rombur/DataTransferKit,amccaskey/DataTransferKit,dalg24/DataTransferKit,amccaskey/DataTransferKit,dalg24/DataTransferKit,ORNL-CEES/DataTransferKit,ORNL-CEES/DataTransferKit,dalg24/DataTransferKit,amccaskey/DataTransferKit