docs(readme): enhance

#40

README.md

@@ -37,14 +37,13 @@ Actool rules for ESLint to validate code / comments actuality and relevance.
 ## Usage
 > **Requirement:** Make sure your repository have the *git history*
 
-> **Get started:** Refer to our [overiew doc](/docs/overview.md) for quick explanation of features and motivation
-
+* Refer to our [overiew doc](/docs/overview.md) for **quick explanation of features and conception**
 * If you don't have ESLint yet configured for your project, follow [these instructions](https://github.com/eslint/eslint#installation-and-usage).
 * Install `eslint-plugin-actool` using `npm` (or `yarn`) for you project or globally:
 
 ```sh
-npm install eslint-plugin-actool --save-dev # install for your project
-npm install eslint-plugin-actool -g         # or install globally
+$ npm install eslint-plugin-actool -D  # install for your project as devDep
+$ npm install eslint-plugin-actool -g  # or install globally
 ```
 
 * Add `eslint-plugin-actool` to the `plugins` option of your `.eslintrc`: