Display appropriate-sized matrix on-load

[waxlamp]

This is meant to prevent overly large or badly structured full adjacency matrices from appearing.

For instance, a 1000x1000 adjacency matrix simply won't be legible if plotted naively.

Even a small, bipartite network can waste a lot of space: the Paul Revere network has two bipartite classes: 7 clubs and ~150-some-odd people. The naive rendering results in a large swath of non-connected nodes (in the club-to-club and people-to-people regions), with a thin, 7x~150 patch encoding the interesting information reflected across the diagonal. Better would be to express the two classes in the rows and columns, and make better use of the full screen real estate.

[gotdairyya]

Alex suggested having 2-3 default views:

1. detailed view: shows label
2. overview: doesn't show labels

[waxlamp]

@jtomeck, feel free to use this issue as a place to discuss design issues, etc., around this feature.