Sails are displayed on first boat in a race. Optimised imports.

- Implemented drawSails method
- Sail position is displayed and updated using a boat's heading
- Sails conform to 'Points of sail'
- Javadoc'd new method and tidied up existing
- Sped up track point frequency (visualiserBoat class)
- Optimised imports (any other classes changed)
- A lot of canvas drawing and sail rotating issues were discovered and eventually overcome along the way. Using a sail image to draw and rotate on the existing canvas rather than a JavaFX shape on a new canvas was the final decision.

#story[1098]

racevisionGame/src/main/java/mock/model/MockRace.java

@@ -4,18 +4,17 @@ import javafx.animation.AnimationTimer;
 import network.Messages.BoatLocation;
 import network.Messages.BoatStatus;
 import network.Messages.Enums.BoatStatusEnum;
+import network.Messages.Enums.RaceStatusEnum;
 import network.Messages.LatestMessages;
 import network.Messages.RaceStatus;
 import network.Utils.AC35UnitConverter;
 import shared.dataInput.BoatDataSource;
 import shared.dataInput.RaceDataSource;
-import network.Messages.Enums.RaceStatusEnum;
 import shared.dataInput.RegattaDataSource;
 import shared.model.*;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
-import java.time.temporal.TemporalUnit;
 import java.util.*;
 
 import static java.lang.Math.cos;