Keybindings can be saved and loaded, and work when Jar'd!

- trying to solve jar file reading issue
- learnt a lot about jars including their lack of file structure
- changed location of keybindings settings to outside of jar
- added new folder/file that is generated on first run

#story[1197]

racevisionGame/src/main/java/visualiser/app/App.java

@@ -51,6 +51,7 @@ public class App extends Application {
 
     @Override
     public void init() {
+        // load the user's personalised key bindings
         keyFactory.load();
 
         ImageView splash = new ImageView(new Image(