Start ArduPlane plugin for VTOL

Improved issue template text

Fix MISSION_CURRENT handling

Also fixed bug with ArduPilot guided waypoint write which would trash
existing mission.

fix LogDownloadController: id is uint16

ArduPlane VTOL indication comes from HEARBEAT

String fixups for localization

Stable merge to master

Camera Modes

Handle survey mode state

Allow Sensors Setup UI to be reused outside of Setup pages

AudioOuput class restructuring

ArduPIlot: Don't show/calibrated compass which are turned off

Add cameras

fix typo which breaks joystick detection on Android

Fix bad meta data

Also hand carried text to speech changes from Stable to master. Plus
unit tests for that.

Update TCPLink.cc

LogDownloadController: start the timeout timer when requesting the first chunk

Add option to disable video auto-delete

Add safety page for ardurover

String fixups for localization

ArduPilot plugins: final -> override to allow custom builds to use as base class