Bot Builder SDK

This is a personal fork from Microsoft's Bot Builder SDK at v1.0.1 for NodeJS.

Changes

• Added SlackBot.listenForMentionsAndDirectMessages to allow queries to be received and processed on Direct Messages as well.
• Added support for Slack's Interactive Message Buttons via SlackBot.listenForMentionsAndDirectMessages upon emit of interactive_message from Botkit's BotController.