Firmware link update

Author: Szymon Dzwończyk

README.md

@@ -3,7 +3,16 @@
 Newest SD card image:
 https://drive.google.com/open?id=16_0G9UX7-NvIJFdP9mQDNYPm05ayJ65J
 
+Open electronics schemes:
+https://github.com/TurtleRover/electronics-shield/releases
+
 - RaspberryPi internal WiFi enabled
 - WiFi name: `TurtleRover` ; password: `password123`
 - Type: http://turtle.rover or http://192.168.100.1 in a browser
 - Supports 1x USB camera, 4x DC motors and 3x servos in the pre-built interface
+
+Everything is licensed under MIT Open-source License. Feel free to use it, but remember to give credits on what you do.
+
+Any help needed? Write: [email protected]
+
+www.turtlerover.com