nanshe/nanshe/registration.py: Add register_mean_offsets, which calls register_offsets using numpy.mean as a template_callable.
nanshe/nanshe/registration.py: Add register_mean_offsets, which calls register_offsets using numpy.mean as a template_callable.

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