Revert "docs(README): update readme"

This reverts commit 8dd9b4e.

Author: vvo

README.md

@@ -52,15 +52,15 @@ Table of Contents
 
 1. [Setup](#setup)
   - [Frontend](#frontend)
-  - [Node.js](#node-js)
-  - [Parse.com](#parse-com)
+  - [Node.js](#nodejs)
+  - [Parse.com](#parsecom-)
   - [React Native](#react-native)
 1. [Quick Start](#quick-start)
-  - [Frontend](#frontend)
+  - [Frontend](#frontend-1)
     - [Vanilla JavaScript](#vanilla-javascript)
     - [jQuery module](#jquery-module)
     - [AngularJS module](#angularjs-module)
-  - [Backend (Node.js)](#backend-node-js)
+  - [Backend (Node.js)](#backend-nodejs)
 1. [Client options](#client-options)
 1. [Callback convention](#callback-convention)
 1. [Promises](#promises)