turn room format and room type into enums; transform line endings

src/mock.rs

@@ -1,4 +1,5 @@
 use crate::*;
+use crate::game::{RoomType, RoomFormat};
 
 pub mod image {
     use crate::Image;
@@ -404,7 +405,8 @@ pub fn game_default() -> Game {
     Game {
         name: "Write your game's title here".to_string(),
         version: Some(Version { major: 6, minor: 5 }),
-        room_format: 1,
+        room_format: Some(RoomFormat::CommaSeparated),
+        room_type: RoomType::Room,
         font: Font::AsciiSmall,
         custom_font: None,
         text_direction: TextDirection::LeftToRight,