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- now OverwritingOperation can set data_flatten but not data. Might evolve, it depends how we saw things.

- add also unit test for it.
- this is quiet a raw version, has to be tested again and wildly optinized

- adapt shift (wok with data_flatten but should probably be extended latter)
- adapt noise reduction (work with data_flatten)
- remove the data reduction widget because should be highly modify since the numpy.ndarra.view in the experiement.data appear. Should be re-done

[unit test] refactoring create test_stream_operation to separate single operation unit test to the steam/pipeline operations

- will be used to define the view to create on the data (using numpy view)
- allow to define dimension based on a kind and a name (to use the metadata)
- add unit test for this specific class
- link to experiement and creation of the view is not done yet

[dataset] Add documentation for unit test and updated since take file_pattern in parameter and rename `_data_files` by `_data_files_pattern`

Add example for generating automatically doc images from screenshots

See merge request !8

[operation] First draw of the COM

See merge request !7

Fix 8

Closes #8

See merge request !6

/close #8

Fix 2

See merge request !4

- update also gradient orange widget.

- also add information about advancement.

Add gradient removal

Closes #5

See merge request !3

/closes #5

- now series is given as a file pattern (give file xxx_0000.edf) and we can browse through this dataset
- rework the Dataset __data to return a fabio `FileSeries`
- postpone the DataReduction to be proceeded by the Dataset to avoid loading of all frames.
- limited to single frame edf file.

create a sub class _MappingBase to get the same interface between IntensityMapping and GradientRemoval.
This also allow to use the PlotMapping class for both.