Fixed JavaDoc, spelling errors, and redundant classes

- Removed some default templates (eg: created by X)
- Wrote JavaDoc for classes that had none
- Made JavaDoc more clear for classes
- Linked JavaDoc to other classes
- Minor spelling errors fixed
- BoatInRace and BoatInRaceTest commented out (to be removed)

#story[1003]

visualiser/src/main/java/seng302/Model/ResizableCanvas.java

@@ -4,7 +4,7 @@ import javafx.scene.canvas.Canvas;
 import javafx.scene.canvas.GraphicsContext;
 
 /**
- * Created by fwy13 on 4/05/17.
+ * The abstract class for the resizable race canvases.
  */
 public abstract class ResizableCanvas extends Canvas {
     protected final GraphicsContext gc;