Vendor dependencies for 0.3.0 release

vendor/rodio/examples/stereo.rs

@@ -0,0 +1,12 @@
+//! Plays a tone alternating between right and left ears, with right being first.
+use std::io::BufReader;
+
+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/RL.ogg").unwrap();
+    sink.append(rodio::Decoder::new(BufReader::new(file)).unwrap());
+
+    sink.sleep_until_end();
+}