provide an HNN-core example to reproduce figure

[jasmainak]

Hi @kohl-carmen hope you are doing well! I was wondering if it would make sense to provide an hnn-core example to reproduce your figures. It would go something like this:

from hnn_core.network_models import calcium_model
from hnn_core import read_params, simulate_dipole

params_fname = 'L_Contra.param'
window_len, scale_factor = 30, 48
net = calcium_model(params_fname, add_drives_from_params=True)

dpls = simulate_dipole(net, tstop=250)

fig, axes = plt.subplots(3, 1)
net.plot_spike_hist(ax=axes[0], show=False)
dpls[0].smooth(window_len).scale(scale_factor).plot(axes[1], show=False)
net.plot_spike_raster(ax=axes[2])