Added IoT pentesting guide reference

Author: dsopas

README.md

@@ -7,20 +7,20 @@ I did this to help me on my security assessments (pentest, bug bounty, red-team,
 
 Each time I finished a task, I marked it with a check icon using [XMind](https://www.xmind.net/). If you don't have this tool, print the image version and use your pencil to mark it as done.
 
-Included in this mindset is [WAHH Methodology](http://mdsec.net/wahh/tasks.html) and [API Security Checklist](https://github.com/shieldfy/API-Security-Checklist).
+Included in this mindset is [WAHH Methodology](http://mdsec.net/wahh/tasks.html), [API Security Checklist](https://github.com/shieldfy/API-Security-Checklist) and [IOT PenTesting Guide](https://www.gitbook.com/book/adi0x901/iot-pentesting-guide/details) from [@adi1391](https://twitter.com/adi1391).
 
 On some particular tasks you have notes (only in XMind format) that provide the name of some tools or links you might use for that particular task.
 
 ## Formats
-If you don't have XMind software, I exported the PNG and the Freemind version. If you need other format, please let me know so I can start exporting it in future versions.
+If you don't have XMind software, I exported the PNG, Freemind and OPML versions. If you need other format, please let me know so I can start exporting it in future versions.
 
 ## How to contribute
 New tasks, tools, typos and other things you think it would help this mindmap, please **Add a new issue on dev branch** on this repo for discussion and validation. Remember that tis is open to ALL infosec community so let us all keep things rolling  :thumbsup:. Any question, feel free to ping me at [Twitter](https://www.twitter.com/dsopas).
 
 ## To do
 - Mobile applications mindmap (iOS and Android)
-- Networking mindmap (currently working on this)
+- Networking mindmap (work in progress)
 - Wifi mindmap
-- IoT mindmap (currently working on this)
-- Export to OPML
+- IoT mindmap (work in progress)
 - Add "Thanks" section for shout people who helped in this project
+- Improve font style and colors