Tweak README (#317)

Remove some sections, add link to RTD.

Author: therve

README.md

@@ -4,21 +4,9 @@ This repository contains a Python API client for the [Datadog API](https://docs.
 The code is generated using [openapi-generator](https://github.com/OpenAPITools/openapi-generator)
 and [apigentools](https://github.com/DataDog/apigentools).
 
-Datadog API Collection
-
-- API version: 1.0
-
-Collection of all Datadog Public endpoints.
-
-  For more information, please visit [https://www.datadoghq.com/support/](https://www.datadoghq.com/support/)
-
-*Automatically generated by the [OpenAPI Generator](https://openapi-generator.tech)*
-
 ## Requirements
 
-Building and using the API client library requires:
-
-1. Python 3.6+
+Building and using the API client library requires [Python 3.6+](https://www.python.org/downloads/).
 
 ## Installation
 
@@ -95,7 +83,9 @@ where `<OperationName>` is the name of the method used to interact with that end
 
 ## Documentation for API Endpoints and Models
 
-Documentation for API endpoints and models can be found under the [`docs`](/docs) directory. 
+Documentation for API endpoints and models can be found under the docs subdirectories, in [v1](/docs/v1#documentation-for-api-endpoints) and [v2](/docs/v2#documentation-for-api-endpoints).
+
+It's also available on [readthedocs](https://datadog-api-client.readthedocs.io/).
 
 ## Documentation for Authorization