`plot_posteriorstructure`, `plot_structure`, and `plot_network` seem inconsistent

[vandenman]

plot_posteriorstructure plots the posterior probability of each structure according to some ordering of the possible structures.

plot_structure plots a network of some structure, probably the one with the highest posterior probability?

Either way, the naming here is somewhat inconsistent because you'd expect both plots to return more or less the same kind of plot based on them ending in "structure". Perhaps plot_posteriorstructureprobs would solve that?

Finally, plot_network shows a network plot with edge labels. plot_structure, however, uses numbers (1:p) which seems inconsistent.

Probably obvious, but the documentation could use some more love :wink:

[KarolineHuth]

Re naming: adapting to plot_structure_probabilities and also plot_complexity_probabilities Re edge labeling: already included in developer branch Re documentation: Improved :)