Enh: specify different properties for different views

[wiheto]

From the example currently in the readme:

fig = plt.figure()
ax_m2 = fig.add_subplot(121, projection='3d')
netplotbrain.plot(template='MNI152NLin2009cAsym',
                  templatestyle='surface',
                  fig = fig,
                  ax = ax_m2,
                  view='A',
                  nodes=nodes,
                  nodesize='centrality_measure1',
                  nodecolor='red',
                  edges=edges)

ax_m2 = fig.add_subplot(122, projection='3d')
netplotbrain.plot(template='MNI152NLin2009cAsym',
                  templatestyle='surface',
                  fig = fig,
                  ax = ax_m2,
                  view='A',
                  nodes=nodes,
                  nodesize='centrality_measure2',
                  nodecolor='blue',
                  edges=edges)
plt.show()

We could make arguments be lists across views. So the above would be

netplotbrain.plot(template='MNI152NLin2009cAsym',
                  templatestyle='surface',
                  view=['A', 'A'],
                  nodes=nodes,
                  nodesize=['centrality_measure1', 'centrality_measure2'],
                  nodecolor=['red', 'blue'],
                  edges=edges)
plt.show()

Benfitis:

• Less code for user to write
• Less figure management by user.

Negatives:

• All input arguments would have to be checked for this behaviour. (So quite a bit of work. Although the function get_frame_input could do most of the work, if modified.)
• Breaks legend behaviour if multiple legends are needed (e.g. example above) unless there is some way to detect when a legend would needed to be repeated or not.

[wiheto]

Currently included for subtitles and templatestyles to test usability. Will add for a couple more kwargs but could be removed if legend problem cannot be solved.