Release of [email protected] to npm

Changes

• Removed try catches that were causing errors to be ate. Added logic to dump stack trace because node isn't always dumping on uncaught exceptions.
• Added NODE_DEBUG logging switch to enable logging of channels other than the emulator.
• Implemented actions.
• Updated reference docs.
• Added keyboard concept and updated Prompts.choice() to use keyboards.
• Added basic support for Facebook quick_replies using keyboards.
• Fixed auth issues around ChatConnector.
• Added new CardAction.dialogAction() type.
• Removed 'cancel' checks from Prompts.
• Updated prompts to not by default exit out after too many retries.
• Added Session.sendTyping() method.
• Updated LKG build and package.json version.