Add ancient test file and add store file information at the end of the game

tests/parse.rs

@@ -13,3 +13,19 @@ fn mirage_1() {
 
     todo!()
 }
+
+#[test]
+fn ancient_1() {
+    let content = std::fs::read("testfiles/de_ancient.dem").unwrap();
+
+    let container = csdemo::Container::parse(&content).unwrap();
+
+    let frame_iter = csdemo::FrameIterator::parse(container.inner);
+    assert_eq!(116676, frame_iter.count());
+
+    let output = csdemo::parser::parse(csdemo::FrameIterator::parse(container.inner)).unwrap();
+
+    assert_eq!("de_ancient", output.header.map_name());
+
+    todo!()
+}