Update changes list.

CHANGES.md

@@ -10,6 +10,16 @@ This file describes changes in the firmware, typically since the previous minor
 	! : important change, possible danger, change of default behavior, etc.
 
 
+##### 7.1.1923 - Apr. 30, 2016 - `feature_integration` branch
+
+`*` Fix configurable signaling outputs (LEDs/beeper).  
+`*` Remove yaw angle filter (and corresponding CTRL_YAW_ANG_TAU param), fixes mission waypoint headings and orbit-type waypoint with PID attitude controller.  
+`*` Enforce orbit waypoint relative heading to target, fixes possible fly-away condition in all firmware since v6.6.  
+`*` Fix maximum horizontal speed for orbit waypoint (it used global default instead of wpt setting in all firmware since v6.6).  
+`~` Increase tolerance for orbit waypoint arrival detection (still not very reliable at higher orbit speeds).  
+`~` On wpt arrival, only freeze heading if it was relative (prevents unnecessary yawing in some cases).  
+`*` Prevent all motor PWM/CAN port outputs once HILS has been activated until system restart.  
+
 ##### 7.1.1919 - Apr. 15, 2016 - `feature_integration` branch
 
 `*` Fix automatic yaw to north at takeoff with PID controller.