Plane: update release notes for 3.6.0beta1

ArduPlane/release-notes.txt

@@ -1,3 +1,55 @@
+Release 3.6.0beta1, 30th April 2016
+-----------------------------------
+
+The ArduPilot development team is proud to announce the release of
+version 3.6.0beta1 of APM:Plane. This is the first beta version of a
+major release.
+
+The biggest changes in this release is the major update of the
+PX4Firmware tree which greatly improves support for the Pixracer
+board, and a lot of QuadPlane improvements and new features.
+
+Detailed changes include:
+
+ - added motortest for all quad motors in sequence
+ - merge upstream PX4Firmware changes
+ - new AC_AttitudeControl library from copter for quadplane
+ - modified default gains for quadplanes
+ - new velocity controller for initial quadplane landing
+ - smooth out final descent for VTOL landing
+ - changed default loop rate for quadplanes to 300Hz
+ - support up to 16 output channels (two via SBUS output only)
+ - fixed bug with landing flare for high values of LAND_FLARE_SEC
+ - improved crash detection logic
+ - added in-flight transmitter tuning
+ - fix handling of SET_HOME_POSITION
+ - added Q_VFWD_GAIN for forward motor in VTOL modes
+ - added Q_WVANE_GAIN for active weathervaning
+ - log the number of lost log messages
+ - Move position update to 50hz loop rather then the 10hz
+ - Suppress throttle when parachute release initiated, not after release.
+ - support Y6 frame class in quadplane
+ - log L1 xtrack error integrator and remove extra yaw logging
+ - limit roll before calculating load factor
+ - simplify landing flare logic
+ - smooth-out the end of takeoff pitch by reducing takeoff pitch min via TKOFF_PLIM_SEC
+ - added support for DO_VTOL_TRANSITION as a mission item
+ - fixed is_flying() for VTOL flight
+ - added Q_ENABLE=2 for starting AUTO in VTOL
+ - reload airspeed after VTOL landing
+ - lower default VTOL ANGLE_MAX to 30 degrees
+ - Change mode to RTL on end of mission rather then staying in auto
+ - implemented QRTL for quadplane RTL
+ - added Q_RTL_MODE parameter for QRTL after RTL approach
+ - reduced the rate of EKF and attitude logging to 25Hz
+ - added CHUTE_DELAY_MS parameter
+ - allow remapping of any input channel to any output channel
+ - numerous waf build improvements
+ - support fast timer capture for camera trigger feedback
+ - numerous improvements for Pixracer support
+ - added more general tiltrotor support to SITL
+
+
 Release 3.5.3, 30th April 2016
 ------------------------------