Fix README.md formatting

Author: exodrifter

README.md

@@ -6,15 +6,15 @@ code in Unity.
 Special thanks to the developers of IronPython who developed the open-source
 integration of Python and .NET, which this plugin uses.
 
-Thanks to Steve Theodore of the [Tech Art Survival Guide](http://techartsurvival.blogspot.com/2013/12/embedding-ironpython-in-unity-tech-art.html)
-who provided many instructions and examples.
+Thanks to Steve Theodore of the [Tech Art Survival Guide][] who provided many
+instructions and examples.
 
 
 Setup
 =====
 Place the source of this project within a "Plugins" folder. For convenience,
-you can use the latest `.unitypackage` release from the [releases]
-(https://github.com/exodrifter/unity-python/releases) page to do this.
+you can use the latest `.unitypackage` release from the [releases][] page to
+do this.
 
 Then, go to `Edit > Project Settings > Player > Optimization` and select the
 `.NET 2.0` option for Api Compatability Level. If you do not take this step,
@@ -50,3 +50,6 @@ An example is provided below. More examples can be found in the
 			Debug.Log(scope.GetVariable<string>("str"));
 		}
 	}
+	
+[Tech Art Survival Guide]: http://techartsurvival.blogspot.com/2013/12/embedding-ironpython-in-unity-tech-art.html
+[releases]: https://github.com/exodrifter/unity-python/releases