Helper tostring in recipe for easier debugging

app/src/main/java/krusty/Recipe.java

@@ -10,6 +10,12 @@ public class Recipe {
     }
 
     public String toString() {
-        return name;
+        StringBuilder sb = new StringBuilder(name + ": ");
+
+        for (Ingredient i : ingredients) {
+            sb.append(i.toString());
+            sb.append(" ");
+        }
+        return sb.toString();
     }
 }