Did some clippy things and wad.rs is being developed

src/wad.rs

@@ -1,6 +1,6 @@
 use std::path::PathBuf;
 use std::fs::File;
-use std::io::BufReader;
+use std::io::{BufReader, Seek, SeekFrom};
 use bincode;
 use serde::Deserialize;
 
@@ -14,7 +14,7 @@ pub struct WadHeader {
 pub fn open_wad(path: &PathBuf) -> WadHeader {
     let mut file =  BufReader::new(File::open(path).unwrap());
     let header: WadHeader = bincode::deserialize_from(&mut file).unwrap();
-
+    file.seek(SeekFrom::Start(header.file_offset_to_start as u64)).unwrap();
 
     header
 }
@@ -26,7 +26,9 @@ mod tests {
     #[test]
     fn test_open_wad() {
         let freedoom_iwad = PathBuf::from("freedoom1.wad");
+        assert!(freedoom_iwad.exists(), "Needs freedoom1.wad - get it from here https://freedoom.github.io"); 
         let ow = open_wad(&freedoom_iwad);
+        assert_eq!(&ow.identifier, b"IWAD");
         assert_eq!(std::str::from_utf8(&ow.identifier).unwrap(), "IWAD");
     }
 }