Precompilation fails if polar data was created with newer Julia version

[ufechner7]

Polars for the RamAirKite are created as bin files. This data format should be changed to csv.

[1-Bart-1]

And *_info.bin should be changed to use JLD2

[ufechner7]

The *_info.bin files have been removed.

[ufechner7]

Fixed in main branch.