Adding old version of readData
Adding old version of readData

We need this version to run pygbe_matrix. We will make it
compatible with new version of pygbe when we decide the
future of pygbe_matrix


Former-commit-id: 033d0170bd78cd6f98e5924a21cfdf8f62b58e92
barbagroup/pygbe,barbagroup/pygbe,barbagroup/pygbe