Official AntennaTracker's sources for apm2 (branch master-AVR) are stopped at version 0.7.4 (without support for yaw continuous rotation servos). New AntennaTracker release from official sources (branch AntennaTracker-release is at version 1.0.0 but does not compile for apm2). With this MOD AntennaTracker is update at v1.0.0 (yaw continuous rotation servos are now supported).
To compile AntennaTracker run "make build apm2" in AntennaTracker's directory