feat(config): Deprecate JSHint in favor of ESLint

Add basic ESLint setup extending well-known Airbnb code style.

Fixes #1072, #1097

modules/articles/server/controllers/articles.server.controller.js

@@ -35,7 +35,7 @@ exports.read = function (req, res) {
 
   // Add a custom field to the Article, for determining if the current User is the "owner".
   // NOTE: This field is NOT persisted to the database, since it doesn't exist in the Article model.
-  article.isCurrentUserOwner = req.user && article.user && article.user._id.toString() === req.user._id.toString() ? true : false;
+  article.isCurrentUserOwner = !!(req.user && article.user && article.user._id.toString() === req.user._id.toString());
 
   res.json(article);
 };