Rework marker feature. (#8)

This PR reworks the implementation of marker features to be able to render
marker casings in the correct render step. It also adds the ability to mark
markers as applicable to specific tracks only.

By accident, the PR also changes the electrification colours.

Author: partim

Cargo.lock

@@ -207,12 +207,12 @@ impl Default for Colors {
 
 //------------ Color Constants -----------------------------------------------
 
-const NONE: &str = "5a3a29ff";
-const AC_HIGH: &str  = "6c2b86ff";
-const AC_LOW: &str = "812c5cff";
-const DC_HIGH: &str = "9b2321ff";
-const DC_LOW: &str = "b64f0dff";
-const RAIL: &str = "007e40ff";
-const FOUR: &str = "53633bff";
-const TRAM: &str = "005387ff";
+const NONE: &str = "452d20ff";
+const AC_HIGH: &str  = "7700d2ff";
+const AC_LOW: &str = "ba048fff";
+const DC_HIGH: &str = "d30000ff";
+const DC_LOW: &str = "e56a00ff";
+const RAIL: &str = "029b3eff";
+const FOUR: &str = "697d4cff";
+const TRAM: &str = "005f9aff";
 

doc/color-style.svg

@@ -11,6 +11,7 @@ use crate::railway::import::eval::Scope;
 use crate::railway::style::Style;
 use super::{AnyShape, Category, Group, Feature, Shape, Stage, StageSet};
 
+
 //------------ GuideContour --------------------------------------------------
 
 /// A contour drawing a guide.