Merge 'CCL ground floor level'

See merge request !36

src/angel_shifts/bottle_angel.rs

@@ -12,10 +12,13 @@ pub struct BottleAngelShift {
 
 impl BottleAngelShift {
     pub fn generate(rng: &mut impl rand::Rng) -> BottleAngelShift {
+        use rand::seq::SliceRandom;
+
+        let compatible_levels = ["assembly-hall-1.svg", "ccl-ground-level.svg"];
+
         BottleAngelShift {
             hours: rng.gen_range(1, 3),
-            // TODO: When there are more levels, randomly select one here.
-            level: "assembly-hall-1.svg".to_owned(),
+            level: compatible_levels.choose(rng).unwrap().to_string(),
         }
     }
 }