Hi!

I'm quite new to graphs, so this may not be a bug at all. Anyway, I noticed while i'm working on my network viewer(http://high5.io/network/), that the distance between nodes is quite randomly set to Infinity, instead of 1 or 2. When i type graphlib.alg.dijkstra(h5.network.graph, h5.id) in the console, I should see distance 0, 1 or anything but not Infinity I think. When I change the graph to directed and copy the edges, this problem seems to be gone. Any idea? Thanks by the way for creating this library!