Fix README (#532)

Fixes #529

README.md

@@ -34,17 +34,18 @@ API consumers use the `DronecodeSDK` class to discover and manage vehicles (`Sys
 
 The links below take you to the respective header files:
 
-- [dronecode_sdk](include/dronecode_sdk.h): set up connection, discover devices
-- [system](include/system.h): an class representing one drone which can consist of multiple components
-- [info](plugins/info/info.h): general info about a device
-- [telemetry](plugins/telemetry/telemetry.h): to receive telemetry data
-- [action](plugins/action/action.h): to send commands such as arm, disarm, takeoff, land to drone
-- [mission](plugins/mission/mission.h)/[mission_item](plugins/mission/mission_item.h): to upload a waypoint mission
-- [offboard](plugins/offboard/offboard.h): for velocity control
-- [gimbal](plugins/gimbal/gimbal.h): control a gimbal
-- [camera](plugins/camera/camera.h): capture images, videos, and set camera settings
-- [follow_me](plugins/follow_me/follow_me.h): drone tracks a position supplied by the Dronecode SDK.
-- [logging](plugins/logging/logging.h): (not implemented) data logging and streaming from the vehicle.
+- [dronecode_sdk](core/include/dronecode_sdk.h): set up connection, discover devices
+- [system](core/include/system.h): an class representing one drone which can consist of multiple components
+- [info](plugins/info/include/plugins/info/info.h): general info about a device
+- [telemetry](plugins/telemetry/include/plugins/telemetry/telemetry.h): to receive telemetry data
+- [action](plugins/action/include/plugins/action/action.h) (and [action_result.h](plugins/action/include/plugins/action/action_result.h)): to send commands such as arm, disarm, takeoff, land to drone
+- [mission](plugins/mission/include/plugins/mission/mission.h)/[mission_item](plugins/mission/include/plugins/mission/mission_item.h): to upload a waypoint mission
+- [offboard](plugins/offboard/include/plugins/offboard/offboard.h): for velocity control
+- [gimbal](plugins/gimbal/include/plugins/gimbal/gimbal.h): control a gimbal
+- [camera](plugins/camera/include/plugins/camera/camera.h): capture images, videos, and set camera settings
+- [follow_me](plugins/follow_me/include/plugins/follow_me/follow_me.h): drone tracks a position supplied by the Dronecode SDK.
+- [calibration](plugins/calibration/include/plugins/calibration/calibration.h): calibrate drone sensors including gyro, accelerometer, and magnetometer.
+- [logging](plugins/logging/include/plugins/logging/logging.h): (not implemented) data logging and streaming from the vehicle.
 
 For more information see the [API Overview](https://sdk.dronecode.org/en/#api-overview) in the Dronecode SDK Guide.