message: add new docs
diff: @@ -368,6 +368,16 @@ and the conversation will not collect responses until it is activated using [con
  Use `createConversation()` instead of `startConversation()` when you plan on creating more complex conversation structures using [threads](#conversation-threads) or [variables and templates](#using-variable-tokens-and-templates-in-conversation-threads) in your messages.
  +#### bot.createPrivateConversation()
  +| Argument | Description
  +|--- |---
  +| message | incoming message to which the conversation is in response
  +| callback | a callback function in the form of function(err,conversation) { ... }
  +
  +This works just like `startPrivateConversation()`, with one main difference - the conversation
  +object passed into the callback will be in a dormant state. No messages will be sent,
  +and the conversation will not collect responses until it is activated using [convo.activate()](#conversationactivate).
  +
  ### Control Conversation Flow
  #### convo.activate()
  