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

# Conflicts:
#	nxtomomill/converter.py

This reverts commit 6ce70a7f.

/close #3277

This reverts merge request !34

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

This reverts commit 03cf6873.

This reverts commit 6c494438.

This reverts commit fe9030b7.

This reverts commit 17726427.

[utils][change_image_key_control] filter frame indexes to insure they are contained in the image_keys buffer