message: docs: Add yarn to README and hint to react-styleguidist
diff: @@ -9,14 +9,22 @@ It provides a default implementation for React components defined via
  (stateless components). These component definitions must follow certain
  guidelines in order to be analyzable (see below for more info).
  +> react-docgen is a low level tool to extract information about react components. If you are searching for a more high level tool try https://github.com/styleguidist/react-styleguidist which comes with a complete styleguide and is build on top of react-docgen.
  +
  ## Install
  -Install the module directly from npm:
  +Install the module with yarn or npm:
  +
  +```
  +yarn add react-docgen --dev
  +```
  ```
  -npm install -g react-docgen
  +npm install react-docgen
  ```
  +
  +
  ## CLI
  Installing the module adds a `react-docgen` executable which allows you to convert
  