- incorporated estimaged_cor, start_time, end_time...

- move version to 1.1 (compatibility is insure with 1.0)
- create a link to beam from root level

- add create_nx_data_group utils function (in new module nxtomomill.converter.utils)
- update one test to insure those links are created

/close #74

- add deprecation warning on it

- to activate this option the H5_ROT_ANGLE_KEYS should be set to None
- close #62

Mimics the EntryReader

[hdf5converter] fully handle the news H5Config that uses a list of FrameGroup instead of a list of dark, a list of flat...

- move AcquisitionStep to nxtomomill.io.acquisitionstep
- create utils function: convert_str_to_frame_grp to convert a string representing a list of FrameGroup like:
```
        urls = (
            (frame_type=dark, entry="silx:///file.h5?data_path=/dark", copy=True),
            (frame_type=flat, entry="silx:///file.h5?data_path=/flat"),
            (frame_type=projection, entry="silx:///file.h5?data_path=/flat"),
            (frame_type=projection, entry="silx:///file.h5?data_path=/flat"),
        )
```

unit test suceed. But we need to add an optional initialization entry (for start_time and end_time) and make distinction between dark_at_start, dark_at_end...

- all url are associated to the same file (input_file)
- using the configuration file seems to provide the same results as using the command line tomoh52nx from the 0.4

[tomoh5tonx] add an option to ignore some sub entries (in the case a set of projections has been canceled for example

Allow to split treatment and gain in readibility of the code.

[converter] refactoring: split the edf and the hdf5 convert. Add classes for each possible acquisition type for hdf5

Split _BlissSample  into two classes: _BlissBasicTomo and _BlissZseriesTomo

- now we will first try to get the camera using NX_class == 'NXdetector' from the instrument group
- if fails then we try to retrieve group that looks like detector (containing `data` dataset which should be 3D)
- users can still force camera names. Either from settings.py of from command line parameter '--valid_camera_names'

Include utils to mock bliss scan from tomwer