Merge branch feature/jorgen.lind/VDSCopy_spelling with refs/heads/master into refs/merge-requests/397/train

Fix problems caused by checking for capitalized header field names after the names have been normalized to be all-lowercase.

Fixed declaration of converting constructor from std::optional that is enabled when compiling with --std=c++17.

Update Python API with removal of IVolumeDataAccessor::IndexOutOfRangeException and  IVolumeDataAccessor::ReadErrorException.

Moved definition of AccessMode from VolumeDataAccessManager to VolumeDataPageAccessor and updated Python API accordingly.

Write Dimensions_01 for unbinned gathers (to get gather-by-gather access) and write Dimensions_013 for crossline-sorted binned (PSTM/PSDM) prestack data.

Fix the check for correct fold so it allows you to import unbinned prestack data (Shot/Receiver/CDP gathers).

and converted SEGYExport and SEGYImport to have the --json-output flag

Make the GetVolumeDataAccessManager function add the reference to the interface instead of doing it in the VolumeDataAccessManager constructor in order to align with commerical VDS. The main argument for doing it this way is that the operation can be 100% thread safe when you make sure to add the reference while you are holding a mutex preventing the interface from being destroyed.

Morten Ofstad authored Mar 31, 2021 and Morten Ofstad committed Apr 08, 2021

Add throwing of ReadError exceptions from a VolumeDataAccessor when reading a page fails. Fix missing IndexOutOfRangeException for VolumeDataAccessor when indexing outside the volume.

Also improve the state handling in the different IO manager
implementations with a RAII state handler