readme update

README.md

@@ -24,4 +24,5 @@ USAGE: robocode-svm --battle x y [alpha]
 ```
 
 # Extras
-In the `extras` folder, there is an assignment, that led to this work. Also, for better understanding, there is a sample SVM classification visualised as an image file in 2D space. The `alpha` parameter (initial gun orientation) was ommited.
+* [assignment](https://github.com/delmadord/robocode_svm/blob/master/extras/assignment.pdf) 
+* [2D visualisation](https://github.com/delmadord/robocode_svm/blob/master/extras/visualize2D.png) **sample** - the *alpha* parameter (initial gun orientation) was omitted.