Performance of the geodesics with cross-zone.

[philderbeast]

Compare and improve the performance of the geodesics:

# --haversines
> ft-extract-input --file=italy2019 --give-fraction=0.001 --give-distance=5 --haversines
> ft-cross-zone --file=italy2019
Reading competition from 'italy2019.comp-input.yaml'
Tracks crossing zones completed in 5.35 m

# --vincenty
> ft-extract-input --file=italy2019 --give-fraction=0.001 --give-distance=5 --vincenty
> ft-cross-zone --file=italy2019
Reading competition from 'italy2019.comp-input.yaml'
Tracks crossing zones completed in 40.08 m

# --andoyerlambert
> ft-extract-input --file=italy2019 --give-fraction=0.001 --give-distance=5 --andoyerlambert
> ft-cross-zone --file=italy2019
Reading competition from 'italy2019.comp-input.yaml'
Tracks crossing zones completed in 20.24 m

# --fsandoyer
> ft-extract-input --file=italy2019 --give-fraction=0.001 --give-distance=5 --fsandoyer
> ft-cross-zone --file=italy2019
Reading competition from 'italy2019.comp-input.yaml'
Tracks crossing zones completed in 21.08 m

# --forsytheandoyerlambert
> ft-extract-input --file=italy2019 --give-fraction=0.001 --give-distance=5 --forsytheandoyerlambert
> ft-cross-zone --file=italy2019
Reading competition from 'italy2019.comp-input.yaml'
Tracks crossing zones completed in 25.02 m

# --pythagorus
> ft-extract-input --file=italy2019 --give-fraction=0.001 --give-distance=5 --pythagorus
> ft-cross-zone --file=italy2019
Reading competition from 'italy2019.comp-input.yaml'
Tracks crossing zones completed in 30.42 m

[philderbeast]

Quick observation, these pairs are giving the same crossings:

# --vincenty
# --forsytheandoyerlambert

# --andoyerlambert
# --fsandoyer