message: doc: Add examples link to documentation
diff: //! controlling devices after successful connection. There are also connectors
  //! included for connecting to servers via Websockets.
  //!
  +//! ## Examples
  +//!
  +//! Code examples are available in the [github
  +//! repo](https://github.com/buttplugio/buttplug-rs/tree/master/buttplug/examples).
  +//!
  +//! The [Buttplug Developer
  +//! Guide](https://buttplug-developer-guide.docs.buttplug.io) may also be
  +//! useful, though it does not currently have Rust examples.
  +//!
  //! ## Attributes
  //!
  //! The following attributes are available
  