Add support to Amazon RDS

v0.5.0

Add support for Amazon RDS service.

Fix description in IntroduceYourself

BUG FIXES:

• core/intent: Fix wrong attribute description in IntroduceYourself intent.

Introduce Yourself

FEATURES:

• core/intent: Add introspection capabilities to discover the intents available. This is a BREAKING CHANGE becouse we use a different method to regiter the intents with Inversify.

ENHANCEMENTS:

• core/intent: The default IntentRepository now is the InMemoryIntentRepository.
• provider/dialogflow: Add the originalRequest attribute to the entities sent to the Intents during the execution.

Interactive Slack Message

Add support to Interactive Slack Message. See https://api.slack.com/interactive-messages for the details about this kind of messages.