Update README.md

Author: GitMarkLab

README.md

@@ -1,5 +1,6 @@
 ### Class_IgusRobolink.py
-This is a basic class to initialize and run the Igus Robolink Robot. In my case it is an RL-DCi-5S-M  
+This is a basic class to initialize and run the Igus Robolink Robot based on the CRI Interface from Common Place Robotics. In my case it is an RL-DCi-5S-M  
+
 It has the following capabilities:  
 - Initialize and automatic check if the robot is already referenced. Otherwise it will automatically run an referencing sequence  
 - run in cartesien coordinates to a relative (moveo) or absolute position (move). the callback is "done" if a defined position is done
@@ -8,4 +9,8 @@ It has the following capabilities:
 ## Limitations
 - Init and connect process is controlled via time.sleep (delay) and not based on an connected callback
 - if a position is not reached the system will hang in a while loop
+
+## further Links
+https://wiki.cpr-robots.com/images/8/81/CPR_RobotInterfaceCRI_V17.pdf
+