Copter: Update RC_FEEL_RP Description
AP_Mission: added MIS_AUTORESTART parameter

- added MIS_AUTORESTART parameter, defaults to 0
- added start_or_resume() function to either start or resume a mission
based on that parameter value
AP_Mission: added reset() function
Plane: RC override input should be considered as valid RC input

this prevents us setting trim values under joystick control
Plane: use MIS_AUTORESET when entering AUTO mode
AP_Mission: improve the AP_Mission docs

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Plane: mark 3.0.2beta
GCS_MAVLink: add DO_MOTOR_TEST message
GCS_MAVLink: generate after adding DO_MOTOR_TEST
Copter: add mavlink motor_test

Based on original work by Nils Hogberg
AP_Motors: output_test for individual motors

Modified and integrated by Randy Mackay
MotorMatrix: output_test for individual motors

Based on original work by Nils Hogberg
CoaxCopter: output_test for individual motors

Based on original work by Nils Hogberg
TradHeli: output_test for individual motors

Based on original work by Nils Hogberg
SingleCopter: output_test for individual motors

Based on original work by Nils Hogberg
TriCopter: output_test for individual motors

Based on original work by Nils Hogberg
Copter: remove cli motor test
AP_GPS: Fix bug that causes permanent lag if we miss a message
Plane: Supply compass with current measurement for compassmot
Copter: Corrected typo in RC_FEEL_RP parameter description