nanshe/misc/neuron_matplotlib_viewer.py: Change image color to reversed greys to be more like ImageJ/FIJI.
nanshe/misc/neuron_matplotlib_viewer.py: Change image color to reversed greys to be more like ImageJ/FIJI.

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