message: update lib documentation
diff: //!
  //! More specifically, ggez is a lightweight game framework for making 2D
  //! games with minimum friction. It aims to implement an API quite
  -//! similar to (a Rustified version of) the Love2D game engine. This
  +//! similar to (a Rustified version of) the `Love2D` game engine. This
  //! means it will contain basic and portable 2D drawing, sound, resource
  //! loading and event handling.
  //!
  //! ## Features
  //!
  //! * Filesystem abstraction that lets you load resources from folders or zip files
  -//! * Hardware-accelerated rendering of bitmaps
  -//! * Playing and loading sounds through SDL2_mixer
  -//! * TTF font rendering with rusttype, as well as bitmap fonts.
  +//! * Hardware-accelerated rendering engine built on the gfx-rs graphics engine
  +//! * Playing and loading .ogg, .wav and .flac files via the `rodio` crate
  +//! * TTF font rendering with `rusttype`, as well as bitmap fonts.
  //! * Interface for handling keyboard and mouse events easily through callbacks
  //! * Config file for defining engine and game settings
  //! * Easy timing and FPS measurement functions.
  //! ggez = "0.2.0"
  //! ```
  //!
  -//! However you also need to have the SDL2, SDL2_mixer and SDL2_image
  +//! However you also need to have the `SDL2` and `SDL2_image`
  //! libraries installed on your system. The best way to do this is
  //! documented [by the SDL2
  //! crate](https://!github.com/AngryLawyer/rust-sdl2#user-content-requirements).
  