Include small world in plot_network_measures about scona

[wingedRuslan]

@KirstieJane I would like to add this measure while I am creating a function to restructure DataFrame obtained from GraphBundle.report_global_measures() to an acceptable DataFrame for seaborn.barplot.

I've run the GraphBundle.report_small_world.
Did I understand the results correctly?

I am calculating the small coefficient of "Real_Graph" in GraphBundle relative to each other Graph in GraphBundle.
So, the small coefficient for "Real_Graph" and "Real_Graph_R0" is 1.6565, for "Real_Graph" and "Real_Graph_R1" is 1.6507 and so on.

On the figure, I need to display eror bar for "Real_Graph" and for random networks - constant value 1.

[wingedRuslan]

@KirstieJane, I've added small_world to network measures
Do you like it?

[wingedRuslan]

Ohhhh, plotting is slow, because inside the function I calculate the small coefficient of "real_graph" relative to each other graph in GraphBundle.
small_world = bundleGraphs.report_small_world(real_network)

It is needed to find a way how to store the calculated small world values and then inside the function simply access this data.