Update README.md

Author: Kei

README.md

@@ -1,8 +1,10 @@
 # Dynamixel2Arduino [![Build Status](https://travis-ci.org/ROBOTIS-GIT/Dynamixel2Arduino.svg?branch=master)](https://travis-ci.org/ROBOTIS-GIT/Dynamixel2Arduino/branches)
 
+## How to add new DYNAMIXEL model.
+ - For the convenience of the user, Dynamixel2Arduino API hardcodes some information in the control table and stores it in flash.
+ - To do this, you need to add code to some files. In this regard, please refer to [PR#3](https://github.com/ROBOTIS-GIT/Dynamixel2Arduino/pull/3) and [PR#7](https://github.com/ROBOTIS-GIT/Dynamixel2Arduino/pull/7)
+
 
 ## TODO
- - Master class API generalization (for public use)
- - Support bulk read/write function for Master
  - Separation of protocol codes (protocol, packet handler)
- - Slave class implementation
+ - Slave class implementation