Vendor dependencies for 0.3.0 release

vendor/rodio/examples/seek_mp3.rs

@@ -0,0 +1,22 @@
+use std::io::BufReader;
+use std::time::Duration;
+
+fn main() {
+    let (_stream, handle) = rodio::OutputStream::try_default().unwrap();
+    let sink = rodio::Sink::try_new(&handle).unwrap();
+
+    let file = std::fs::File::open("assets/music.mp3").unwrap();
+    sink.append(rodio::Decoder::new(BufReader::new(file)).unwrap());
+
+    std::thread::sleep(std::time::Duration::from_secs(2));
+    sink.try_seek(Duration::from_secs(0)).unwrap();
+
+    std::thread::sleep(std::time::Duration::from_secs(2));
+    sink.try_seek(Duration::from_secs(4)).unwrap();
+
+    sink.sleep_until_end();
+
+    // wont do anything since the sound has ended already
+    sink.try_seek(Duration::from_secs(5)).unwrap();
+    println!("seek example ended");
+}