Merge branch 'add-world' into 'master'

Add world struct

See merge request mhart/DancingDroids!13

src/main.rs

@@ -1,7 +1,14 @@
 use std::fs;
 use std::io;
 
-/// Struct to store robot position
+/// Struct to store the world.
+struct World {
+    x: u32,
+    y: u32,
+    map: Vec<char>,
+}
+
+/// Struct to store robot position.
 struct Position {
     x: u32,
     y: u32,