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).

[Sebastian Noack, 2017/02/10 18:04:31]

This seems a little inconsistent with the decision to name it eslint-config-eyeo
(rather than eslint-config-abp). If we stick to that name, but don't move the
styleguide to eyeo.com yet (we won't), perhaps we should at least clarify that
it's the coding style used by all Eyeo projects, to avoid confusion.

[kzar, 2017/02/10 19:10:44]

Done.

+
+## Installation
+
+    npm install -g eslint eslint-config-eyeo
+
+(As root, or using sudo.)
+
+## Usage
+
+To lint a JavaScript file using ESLint you simply run the `eslint` command with
+the file as an argument. For example:
+
+    eslint some-file.js
+
+(For advanced usage see `eslint --help`.)
+
+Note: If you need to lint files inside projects which do not already have an

[Sebastian Noack, 2017/02/10 18:04:31]

This is not only relevant when linting projects that don't have an ESLint
configuration, but that is also the minimal boilerplate when creating an ESLint
configuration for a project. Mind clarifying that?

[kzar, 2017/02/10 19:10:44]

Done.

+ESLint configuration which extends `eslint-config-eyeo` you can create a
+personal configuration in `~/.eslintrc.json` like so:
+
+    {
+      "extends": "eslint-config-eyeo"
+    }