Issue 3692 - Add base ESLint configuration

eslint-config-eyeo/README.md

 # eslint-config-eyeo
 
 An [ESLint](http://eslint.org) configuration that checks for compliance with the
 [Adblock Plus coding style guide](https://adblockplus.org/coding-style#javascript)
 which is used for all eyeo projects.
 
 ## Installation
 
     npm install -g eslint eslint-config-eyeo
 
-(As root, or using sudo.)
+This command requires administrator privileges so you might need to use `sudo`.
 
 ## Usage
 
-To lint a JavaScript file using ESLint you simply run the `eslint` command with
-the file as an argument. For example:
+To lint a JavaScript file using ESLint you run the `eslint` command with the
+file as an argument. For example:
 
     eslint some-file.js
 
-(For advanced usage see `eslint --help`.)
+For advanced usage see `eslint --help`.
 
 In order to use eslint-config-eyeo your project's ESLint configuration
 should extend from it. A minimal example looks like this:
 
     {
       "extends": "eslint-config-eyeo",
       "root": true
     }
 
-(For projects without an ESLint configuration you can create your own
+For projects without an ESLint configuration you can create your own
 personal configuration in `~/.eslintrc.json`, but take care to remove
-the `"root": true` section from the above example.)
+the `"root": true` section from the above example.