message: Add dialog state to Slackbot worker createDialog
diff: @@ -655,7 +655,7 @@ module.exports = function(botkit, config) {
  /* helper functions for creating dialog attachments */
  - bot.createDialog = function(title, callback_id, submit_label, elements) {
  + bot.createDialog = function(title, callback_id, submit_label, elements, stateString) {
  var obj = {
  data: {
  @@ -663,6 +663,7 @@ module.exports = function(botkit, config) {
  callback_id: callback_id,
  submit_label: submit_label || null,
  elements: elements || [],
  + state: stateString,
  },
  title: function(v) {
  this.data.title = v;
  @@ -676,6 +677,10 @@ module.exports = function(botkit, config) {
  this.data.submit_label = v;
  return this;
  },
  + state: function(stateStr) {
  + this.data.state = stateStr;
  + return this;
  + },
  addText: function(label, name, value, options, subtype) {
  var element = (typeof(label) === 'object') ? label : {
  