Baro_BMP085: init members to resolve compiler warnings
AC_WPNav: init members to resolve compiler warnings
AHRS_DCM: init members to resolve compiler warnings
GPSGlitch: init members to resolve compiler warnings
INS_HIL: init members to resolve compiler warnings
AC_MotorsHeli: init member to resolve compiler warning
Mount: init members to resolve compiler warnings
Mount: correct comment on set_mode_to_default time
Notify: add break to resolve compiler warning
ServoRelayEvents: init members to resolve compiler warning
Git: ignore terrain data files
Copter: ACRO add expo

adds 30% expo to roll and pitch
Copter: ACRO Error calculation fix
Copter: AC_ATT correct yaw error calculation
INS: add accessor for mpu6k filter
AC_AttControl: set rate D term filter from ins filter
Copter: add ACRO_EXPO parameter
Copter: Autotune Fix
AP_L1_Control: prevent another NaN in L1
GCS_MAVLink: added MAV_CMD_NAV_ALTITUDE_WAIT and MAV_CMD_NAV_LOITER_ALTITUDE

this will be used for high altitude balloon launches