Vendor dependencies for 0.3.0 release

vendor/ogg/README.md

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+## Ogg
+
+An Ogg decoder and encoder. Implements the [xiph.org Ogg spec](https://www.xiph.org/vorbis/doc/framing.html) in pure Rust.
+
+[Documentation](https://docs.rs/ogg/0.8.0).
+
+If the `async` feature is disabled, Version 1.27.0 of Rust is the minimum supported one.
+
+Note: `.ogg` files are vorbis encoded audio files embedded into an Ogg transport stream.
+There is no extra support for vorbis codec decoding or encoding in this crate,
+so you need additional functionality in order to decode them. For example, you can use the
+[lewton](https://github.com/RustAudio/lewton) crate.
+
+Also note that the encoder part of the Crate isn't as well tested as the decoder part,
+in fact it was only written in order to write compact testing code for the decoder.
+
+## License
+
+Licensed under the three clause BSD license. For details, see the [LICENSE](LICENSE) file.