Now all the miners will always appear in the same order (alphabetic)
d3.json("/web/graph_data/miner_dead_hash_rates/last_" + lowerperiod, function(dead_data) {
var users = {}; for(var i = 0; i < data.length; ++i) for(var u in data[i][1]) users[u] = null; for(var i = 0; i < dead_data.length; ++i) for(var u in dead_data[i][1]) users[u] = null;
var userlist = []; for(var u in users) userlist.push(u);
+ userlist.sort();
d3.select("#miners").selectAll("*").remove();
var div = d3.select("#miners").selectAll().data(userlist).enter().append("div");
div.append("h3").text(identity);