nanshe/learner.py: Fix up spawning of jobs by using a quick wrapper startup using the same python interpreter and ensuring the `nanshe` module is at the beginning of the path.
nanshe/learner.py: Fix up spawning of jobs by using a quick wrapper startup using the same python interpreter and ensuring the `nanshe` module is at the beginning of the path.

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