pixel order inconsistent in filled containers

[maxnoe]

All data comes in the arbitrary module order, which is different from the spiral pattern of increasing pixel ids.

In the source, some fields are re-ordered (e.g. the waveform, calibration info etc.) and some are not.

This inconsistency makes it very hard to know when one has to take expected_pixels_id into account and when not.

We should try to consistently reorder all data or at least document which fields are in the order as received and which are re-ordered to be the ascending pixel id order.

[ccossou]

Maybe we could add a filter and sorting method to the data class, to ensure things are done consistently?