add options to the EDFConfig and link it with the
nxtomomill edf2nxapplication. Those options are
duplicate_data: True by default. If false then one hdf external dataset will be created per frame and one hdf virtual will connect them all
external_link_pathusers can ask to have
test reconstruction from nabu with it
no performance test have been made on it. But we could not expect to have good performances with such a system (virtual dataset + one exteral dataset per frame). But this is the most direct way to add this feature.