[utils][_insert_frame_data] fix virtual dataset creation. Cannot use...

See merge request !39

[h5_to_nx] handle zserie

See merge request !38

[utils][_insert_frame_data] fix virtual dataset creation. Cannot use SapceID.shape but should use bounds

Split _BlissSample  into two classes: _BlissBasicTomo and _BlissZseriesTomo

- add a new parameter in settings 'H5_ZSERIE_INIT_TITLES'
  will be merge with 'H5_INIT_TITLES' when h5_to_nx is call
- split _Acquisition into a base class (_BaseAcquisition and _ZSerieAcquisition). PR of ID15 data will need to be rework due to this I guess.
- _ZSerieAcquisition is a serie of _StandardAcquisition. 'write_as_nxtomo' is now only part of StandardAcquisition

/close #35

/close #35

This reverts commit 03cf6873.

This reverts commit 6c494438.

This reverts commit fe9030b7.