Added outputs for road curve length, and grade percentage#10

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Commits on Jul 26, 2021

Added outputs for road curve length, and grade percentage
RosaryMala
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Commits on Jul 27, 2021

Added a radius of curvature readout. Still need to make it show up when there's none of the other readouts showing, if it's available.
RosaryMala
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Commits on Jul 28, 2021

- Show the radius on all points that should have it.
RosaryMala
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Commits on Nov 8, 2021

Use nullable float instead of float.NaN
RosaryMala
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