Callback based connectAll

gistfile1.js

Bot.prototype.connectAll = function (callback) {
  var that = this;
  that.client.connect(5, function (input) {
    that.channels.forEach(function (channel, index, channels) {
      that.client.join(channel, function (input) {
        if (index === (channels.length - 1)) {
          if (!! callback)
            callback();
        }
      });
    });
  });
};