code: function connect(orbs, callback) {
    var total = Object.keys(orbs).length,
        finished = 0;
  
    function done() {
      finished++;
      if (finished >= total) { callback(); }
    }
  
    for (var name in orbs) {
      orbs[name].connect(done);
    }
  }
docs: connects all spheros, triggering callback when done