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.)

[Wladimir Palant, 2017/02/14 12:43:20]

Nit: I'm not a big fan of having an entire sentence in parentheses (yes, Dave
disagrees). How about:

  This command requires administrator privileges so you might need to use sudo.

No "root" (which a Unix detail) and no parentheses.

[kzar, 2017/02/15 05:24:22]

(Done.)

+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

[Wladimir Palant, 2017/02/14 12:43:20]

Nit: Please avoid using the word "simply" in instructions. You don't want to
make people feel stupid if it turns out complicated in the end ;)

[kzar, 2017/02/15 05:24:22]

Good point, Done.

-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`.)

[Wladimir Palant, 2017/02/14 12:43:20]

Nit: Parentheses are unnecessary here.

[kzar, 2017/02/15 05:24:22]

Done.

+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.)

[Wladimir Palant, 2017/02/14 12:43:20]

Nit: Parentheses are unnecessary here.

[kzar, 2017/02/15 05:24:22]

Done.

+the `"root": true` section from the above example.