Copter: AC3.3-rc5 release notes

ArduCopter/ReleaseNotes.txt

@@ -1,5 +1,16 @@
 APM:Copter Release Notes:
 ------------------------------------------------------------------
+Copter 3.3-rc5 23-May-2015
+Changes from 3.3-rc4
+1) Fix AHRS bad gyro health message caused by timing jitter and log IMU health
+2) TradHeli gets better default rate PIDs 
+3) Small changes/fixes:
+    a) GCS can use MAV_CMD_MISSION_START to start mission in AUTO even without pilot raising throttle 
+    b) GCS can force disarming even in flight by setting param2 to "21196"
+    c) rc-override timeout reduced from 2 seconds to 1 (applies when using GCS joysticks to control vehicle)
+    d) do-set-speed fix so it takes effect immediately during missions
+    e) GCS failsafe disarms vehicle if already landed (previously it could RTL) 
+------------------------------------------------------------------
 Copter 3.3-rc4 17-May-2015
 Changes from 3.3-rc3
 1) AutoTune: