web-firmware: Added an icon and link for AntennaTracker

Tools/autotest/web-firmware/index.html

@@ -77,6 +77,9 @@ The software and hardware we provide is only for use in unmanned
 		      traditional helicopters<p>
 <a href="Rover"><img src="images/rover.png" width="80"
 		     alt="Rover">APM Rover</a> - for land vehicles and boats<p>
+<a href="AntennaTracker"><img src="images/antenna-tracker.png" width="80"
+		     alt="AntennaTracker">APM Antenna Tracker</a> -
+		     for antenna tracking of ArduPilot vehicles<p>
 <a href="Tools/MissionPlanner"><img src="images/planner.png" width="80"
 		     alt="MissionPlanner">MissionPlanner</a> - Mission Planner tool<p>
 <a href="Tools/APMPlanner"><img src="images/ap_rc.png" width="80"