Update README.md

-update links for GT-511C3 and GT-511C1R
-link to documentation

Author: bboyho

README.md

@@ -1,16 +1,23 @@
 Fingerprint_Scanner-TTL
 =======================
 
-[![FingerPrint Scanner](https://dlnmh9ip6v2uc.cloudfront.net/images/products/1/1/7/9/2/11792-01_medium.jpg)  
-*Fingerprint Scanner - TTL (GT-511C3)(SEN-11792)*](https://www.sparkfun.com/products/11792)
+<table class="table table-hover table-striped table-bordered">
+<tr><td><a href="https://www.sparkfun.com/products/11792"><div align="center"><img src="https://cdn.sparkfun.com//assets/parts/8/0/7/3/11792-04a.jpg" title="Fingerprint Scanner - TTL (GT-511C3)
+"></div></a></td>
+<td><a href="https://www.sparkfun.com/products/13007"><div align="center"><img src="https://cdn.sparkfun.com//assets/parts/9/9/7/2/13007-02.jpg" title="Fingerprint Scanner - TTL (GT-511C1R)"></div></a></td>
+<tr><td>Fingerprint Scanner - TTL (GT-511C3) [ SEN-11792 - https://www.sparkfun.com/products/11792 ]</td><td>
+Fingerprint Scanner - TTL (GT-511C1R)[ SEN-13007 - https://www.sparkfun.com/products/13007 ]</td></tr>
+</table>
 
-This is a great fingerprint module from ADH-Tech that communicates over TTL Serial so you can easily embed it into your next project. 
-
-This repository contains example code to work with it. 
+This is a great fingerprint module from ADH-Tech that communicates over 3.3V TTL Serial so you can easily embed it into your next project. This repository contains Arduino example code to work with it. This code has been tested with GT-511C3 and GT-511C1R.
 
 Repository Contents
 -------------------
-* **/FPS_GT511C3** - Arduino Library to interface with the sensor.
+* **/FPS_GT511C3** - Arduino library and example code to interface with the sensor.
+
+Documentation
+----------------
+* [SparkFun Fingerprint Scanner Hookup Guide](https://learn.sparkfun.com/tutorials/fingerprint-scanner-hookup-guide) - Hookup guide to connect to the GT-511C3 and GT-511C1R.
 
 License Information
 -------------------
@@ -20,4 +27,4 @@ The original library license is as follows:
 "	Created by Josh Hawley, July 23rd 2013
 	Licensed for non-commercial use, must include this license message
 	basically, Feel free to hack away at it, but just give me credit for my work =)
-	TLDR; Wil Wheaton's Law "
+	TLDR; Wil Wheaton's Law "