Add preview to readme

Author: b-gran

README.md

@@ -2,9 +2,13 @@
 
 [![Build Status](https://travis-ci.org/b-gran/object-editor-react.svg?branch=master)](https://travis-ci.org/b-gran/object-editor-react) [![npm version](https://badge.fury.io/js/object-editor-react.svg)](https://badge.fury.io/js/object-editor-react)
 
-`object-editor-react` is a table-based `JSON` object editor build using `React.js`.
+`object-editor-react` is a table-based `JSON` object editor built using `React.js`.
 
-Its purpose is to enable drop-in editing of deeply nested JSON objects with minimal configuration.
+It enables drop-in, structured editing of deeply nested JSON objects with minimal configuration.
+
+## Preview
+
+![](assets/demo.gif)
 
 Here's how it works: