Tutorial required for Rasa Core 0.11.1 custom actions, online training and NLG

It was mentioned in the CHANGELOG in the repository, but I agree that such groundbreaking changes should be announced everywhere on a larger scale.

As for online training, it’s just 2 days old and it doesn’t even have a documentation yet, let alone a GUI interface. People would’ve started working on it (as have I), so expect a crude GUI within 5-10 days.