Feature Request: create a customizable hud by overlaying telemetry on video feed

[ltrzcinski]

Create a customizable HUD to overlay telemetry over video feed. This will enable pilots to fly without GCS but with some control over flight parameters. Also, flying with goggles would be much more confident. Telemetry items shall be customizable at least with fonts and position. Latency and signal strength indicators are one of most important.

OpenHD is good reference.