feat: f32/f64 cargo features added

Signed-off-by: Stephen Waits <steve@waits.net>

src/lib.rs

@@ -96,6 +96,10 @@
 mod height_vector;
 mod vector;
 
+// make sure we don't have conflicting features
+#[cfg(all(feature = "f32", feature = "f64"))]
+compile_error!("feature \"f32\" and feature \"f64\" cannot be enabled at the same time");
+
 // publish our interface
 pub mod network_coordinate;
 pub use network_coordinate::NetworkCoordinate;