Dialogflow - July 24th, 2018 [Feature]

## Feature Beta launch of [Adding Speech Response to Detect Intent Requests](https://cloud.google.com/dialogflow/docs/detect-intent-tts) ## Feature Beta launch of [Adding Sentiment Analysis to Detect Intent Requests](https://cloud.google.com/dialogflow/docs/sentiment) ## Feature Beta launch of [Knowledge Connectors](https://cloud.google.com/dialogflow/docs/knowledge-connectors) ## Feature Beta launch of [Telephony Gateway](https://cloud.google.com/dialogflow/docs/telephony) ## Feature Beta launch of [Data Logging and Enhanced Speech Models](https://cloud.google.com/dialogflow/docs/concepts/data-logging) ## Feature Beta launch of [Automatic Spell Correction](https://cloud.google.com/dialogflow/docs/agents-settings#ml%5Fsettings%5Fmachine%5Flearning)