update README.md

Author: Pythonista7

README.md

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 # Kotlin Doorman Client
 
-This is a Kotlin client for the [Doorman](https://github.com/Pythonista7/doorman) service which allows voluntary client-side rate limiting. The big idea can be captured in this image:
+This is a Kotlin client for the [Doorman](https://github.com/Pythonista7/doorman) service which allows voluntary client-side rate limiting. The big idea can be captured in this image and this repo represents the `client` part of the implementation.
 
 ![Doorman](https://github.com/Pythonista7/doorman/blob/master/doc/loadtest/overview.png)