ArduCopter3D 2014-Jul-06
 - Stabilize Mode now follows acro mode pitch/yaw direction
 - Changed battery sag compensation to start low to avoid startup kick.
 - Added yaw movement to pitch/roll integrators
   - improved high wind control substantially!
Merge branch 'Arducopter3D' of https://github.com/bdoiron74/ardupilot into Arducopter3D