Striver-mini VTOL RealFlight model and parameters.

[de-okpara]

Adding Striver-mini VTOL UAV SITL model on request from @tridge

[tridge]

thanks, the tuning needs a bit more work, especially for yaw, but main thing I'd like to see is removal of all the default parameters from the parameter list, it should just be the parameters that are changed from the defaults

[timtuxworth]

thanks, the tuning needs a bit more work, especially for yaw, but main thing I'd like to see is removal of all the default parameters from the parameter list, it should just be the parameters that are changed from the defaults

@tridge, @Georacer It's interesting that flying this in RealFlight (for me), really shows the shudder on transition, worse on forward transition, that I see on other vehicles, but really obvious on this one.