Fix 47

See merge request !69

add methods to save and load computed darks / flats.

See merge request !65

TomoScanBase: add an option to return DataUrl for frames instead of numpy arrays from `_load_frame_dictload_` (fallback function of `load_reduced_darks` and `load_reduced_flats`)

* during save: several urls can be provided in order save the results at different places (requested by nabu and tomwer)
* DataUrl in this particular case can handle patterns like '{entry}', '{index}' and '{index_zfill4}' in order to handle all use cases (EDF + HDF5)
* during load several urls can also be provided in order to look at some specific locations

[refactoring] try to get rid of the 'ref' (frame) references and replace them...

See merge request !64

Revert "Merge branch 'update_HDFFile' into 'master'"

See merge request !62

This reverts merge request !61

[io][HDF5File] benefit when possible of the "locking" parameter from h5py

See merge request !61

Not sure we gain :-)

[io][HDF5File] benefit when possible of the "locking" parameter from h5py (with HDF5 >= 1.12.1 or 1.10.x >= 1.10.7.)

repalce some `ref` (related to frame) to `flat` in order to be more generic

Closes #2

See merge request !60

[refactoring] try to get rid of the 'ref' (frame) references and replace them by flat in order to be not on the esrf reference.

/close #2

add get_relative_file

Closes #37

See merge request !59

User-defined NX version

See merge request !58

Improve mock

See merge request !57