nanshe/nanshe/advanced_image_processing.py: Return to using merge once until bugs with repeated merging can be fixed.
nanshe/nanshe/advanced_image_processing.py: Return to using merge once until bugs with repeated merging can be fixed.

jakirkham/nanshe,nanshe-org/nanshe,jakirkham/nanshe,nanshe-org/nanshe,DudLab/nanshe,DudLab/nanshe