Update README.md with installation via Cargo.

README.md

@@ -3,17 +3,37 @@ Rust-SDL2_image
 
 Rust bindings for SDL2_image
 
-Requirements
-------------
+# Overview
 
-* [Rust-sdl2](https://github.com/AngryLawyer/rust-sdl2)
-* sdl_image 2.0 development libraries
-* Rust master
+Rust-SDL2_image is a library for talking to the new SDL2_image library from Rust.
 
-Installation
-------------
+Rust-SDL2_image uses the MIT license.
 
+# Requirements
+
+* [Rust-SDL2](https://github.com/AngryLawyer/rust-sdl2)
+* SDL_image 2.0 development libraries
+* Rust master -- usage of Nightly is recommended
+
+# Installation
+
+If you're using Cargo to manage your project, enter the following into your
+Cargo.toml file:
+
+```toml
+[dependencies.sdl2_image]
+git = "https://github.com/xsleonard/rust-sdl2_image"
 ```
+
+Otherwise, clone this repo and run:
+
+```bash
+cargo build
+```
+
+If you're not using Cargo, you can compile manually:
+
+```bash
 git clone https://github.com/xsleonard/rust-sdl2_image
 cd rust-sdl2_image
 rustc src/sdl2_image/lib.rs
@@ -21,10 +41,18 @@ rustc src/sdl2_image/lib.rs
 rustc --cfg mac_framework src/sdl2_image/lib.rs
 ```
 
-Demo
-----
+# Demo
 
+You'll find included with the library a simple demo that loads and displays
+a given image :
+
+```bash
+cargo run /path/to/some/image.(jpg|png)
 ```
+
+Or:
+
+```bash
 rustc -L. src/demo/main.rs -o demo
-./demo image.[png|jpg]
+./demo image.(png|jpg)
 ```