figure size is now dependent on n_iter being 1 or more
added parameter topo_size_scaling: if True the width of the topologies scales width the displayed time interval. Ie, if 1000 ms are plotted and event_width = 50 ms, it's very small (this was the previous behavior). If False, topologies are fixed percentage of figure width. In both cases, magnify changes the topo size.
n_iterbeing 1 or moretopo_size_scaling: ifTruethe width of the topologies scales width the displayed time interval. Ie, if 1000 ms are plotted and event_width = 50 ms, it's very small (this was the previous behavior). IfFalse, topologies are fixed percentage of figure width. In both cases,magnifychanges the topo size.