nanshe/nanshe/registration.py: If the frames to be registered have the same number of dimensions as the template, simply assume this is one frame and add a singleton dimension at the beginning to clarify that.
nanshe/nanshe/registration.py: If the frames to be registered have the same number of dimensions as the template, simply assume this is one frame and add a singleton dimension at the beginning to clarify that.

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