Added Modularity to Input Checker.

- Added onHold
 - Added onRelease
 - Added ManualTesting Class in the tests
 - Added Unimplemented new methods to classes
 #story[1006]

visualiser/src/main/java/seng302/gameController/Keys/DownWindKey.java

@@ -21,4 +21,14 @@ public class DownWindKey extends ControlKey {
     public void onAction() {
 
     }
+
+    @Override
+    public void onHold() {
+
+    }
+
+    @Override
+    public void onRelease() {
+
+    }
 }