Update README.md

README.md

@@ -1,17 +1,36 @@
 opendig
 =======
 
-Command-line tool for Open Name System (like dig is for DNS)
+### Table of Contents
+[Overview](#overview)  
+[Installation](#installation)  
+[Command Line Usage](#cli)  
+[Python Package Usage](#pythonpackage)  
+[Configuration](#configuration)  
 
-Installation
-=======
+<a name="overview"/>
+## Overview
+
+opendig is the equivalent of dig for the Open Name System, which extends DNS by supporting the registration and resolution of:
+
+1. user handles on the blockchain (deployed)
+1. domains on the blockchain (design phase)
+
+#### ONS = ICANN DNS + blockchain handles + blockchain domains
+
+ONS is 100% backwards compatible with ICANN DNS and simply extends the functionality.
+
+Likewise, opendig has 100% of the functionality of dig.
+
+<a name="installation"/>
+## Installation
 
 ```
 $ sudo pip install opendig
 ```
 
-Command-line Usage
-=======
+<a name="cli"/>
+## Command-line Usage
 
 ```
 $ opendig -u naval
@@ -19,8 +38,9 @@ $ opendig bitcoin -u naval
 $ opendig -d startupboy.com
 ```
 
-Python Package Usage
-=======
+<a name="pythonpackage"/>
+## Python Package Usage
+
 ```
 from opendig import ons_resolver
 print ons_resolver('naval')
@@ -29,8 +49,8 @@ from opendig import dns_resolver
 print dns_resolver('startupboy.com')
 ```
 
-Configuration
-=======
+<a name="configuration"/>
+## Configuration
 
 OpenDig comes with pre-configured default servers 8.8.8.8 (public DNS server by Google) and 162.243.253.65 (public ONS server by OneName). We *strongly* recommend using a local config file, and using servers of your own choice: