Reversed In-scatter Group Order

Before the change, out-scatter groups were looped through in reverse (njoy group 70 ---> saved in hdf5 group 1). In the parser, each out-scatter group has a vector of groups that it in-scatters to. These groups are also in the NJOY order where group 70 should be group 1 in my case. The current parser does not account for this and saves them in this reverse order. My additions keep the looping structure the same but changes the group when it indexes the HDF5 array.