Merge pull request #55 from NREL/fix/heading-and-elev-pyo3

exposed `Heading` and `Elev` in python

Author: sakhtar312

rust/altrios-core/src/prelude.rs

@@ -44,5 +44,5 @@ pub use crate::train::{
 };
 
 pub use crate::track::{
-    Link, LinkIdx, LinkPath, LinkPoint, Location, Network, TrainParams, TrainType,
+    Elev, Heading, Link, LinkIdx, LinkPath, LinkPoint, Location, Network, TrainParams, TrainType,
 };

rust/altrios-py/src/lib.rs

@@ -49,6 +49,8 @@ fn altrios_pyo3(_py: Python, m: &PyModule) -> PyResult<()> {
     m.add_class::<TimedLinkPath>()?;
     m.add_class::<LinkPoint>()?;
     m.add_class::<Link>()?;
+    m.add_class::<Elev>()?;
+    m.add_class::<Heading>()?;
     m.add_class::<Location>()?;
     m.add_class::<Network>()?;
     m.add_class::<LinkPath>()?;