Copter: AC3.3-rc8 release notes

ArduCopter/ReleaseNotes.txt

@@ -1,5 +1,33 @@
 APM:Copter Release Notes:
 ------------------------------------------------------------------
+Copter 3.3-rc8 25-Jul-2015
+Changes from 3.3-rc7
+1) EKF improvements:
+    a) de-weight accelerometers that are clipping to improve resistance to high vibration
+    b) fix EKF to use primary compass instead of first compass (normally the same)
+2) UBlox "HDOP" corrected to actually be hdop (was pdop) which leads to 40% lower value reported
+3) TradHeli:
+    a) Motors library split into "Multicopter" and "TradHeli" so TradHeli does not see multicopter parameters
+    b) Heading target reset during landing to reduce vehicle fighting to rotate while on the ground
+4) Minor enhancements:
+    a) SToRM32 gimbal can be connected to any serial port
+    b) log when baro, compass become unhealthy
+    c) ESC_CALIBRATION parameter can be set to "9" to disable esc calibration startup check
+    d) Circle rate adjustment with ch6 takes effect immediately
+    e) log home and origin
+    f) pre-arm check of battery voltage and fence
+5) Bug fixes:
+    a) fix THR_MIN being incorrectly scaled as pwm value during low-throttle check
+    b) fence distance calculated from home (was incorrectly calculated from ekf-origin)
+    c) When flying with joystick and joystick is disconnected, control returns immediately to regular TX
+    d) dataflash's ATT yaw fixed to report heading as 0 ~ 360
+    e) fix to mission's first command being run multiple times during mission if it was a do-command
+    f) ekf-check is enabled only after ekf-origin is set (stops red-yellow flashing led when flying without GPS lock)
+    g) fix initialisation of mount's mode
+    h) start-up logging so parameters only logged once, mission always written
+6) Linux:
+    a) bebop support 
+------------------------------------------------------------------
 Copter 3.3-rc7 28-Jun-2015
 Changes from 3.3-rc6
 1) reduce EKF gyro bias uncertainty that caused attitude estimate errors