9868 nodes in WikiGraph

Ha! I located one of the bugs, apparently the setting of the repulsion strength parameter in the balancing algorithm caused the flying off into infinity of nodes. I fixed it, and right away managed to graph almost 10,000 articles centered on Mathematics! I could probably go larger, but each of these Graphs is taking up to half an hour to fully balance on my computer. Let's see, maybe TUM has a nice multicore machine we can use for a bit...