Implemented wind walker algorithm. Refactored some GameState updating logic to allow for better token logic integration

GameState: Moved all token logic into its own function startPoint so that it is dsijoint from other updating logic
GameState: Implemented wind walker algorithm.
GameState: Changed Generic 'speedMultiplier' to 'serverSpeedMultiplier' to make it obviously disjoint from a boats speed multiplier
MessageFactory: Moved some found message creation (Chatter Message)  server side into MessageFactory that wasnt already there
ServerYacht: Added a speed multiplier and a handling multiplier to the serveryacht class that is set and reset upon powerup / down

#story[1293]

src/test/java/seng302/gameServer/server/ChatCommandsTest.java

@@ -110,7 +110,7 @@ public class ChatCommandsTest {
         } catch (InterruptedException ie) {
             ie.printStackTrace();
         }
-        Assert.assertEquals(5.0, GameState.getSpeedMultiplier(), 0.00001);
+        Assert.assertEquals(5.0, GameState.getServerSpeedMultiplier(), 0.00001);
         mst.terminate();
         try {
             Thread.sleep(200);
@@ -150,7 +150,7 @@ public class ChatCommandsTest {
             ie.printStackTrace();
         }
         mst.terminate();
-        Assert.assertEquals(1.0, GameState.getSpeedMultiplier(), 0.00001);
+        Assert.assertEquals(1.0, GameState.getServerSpeedMultiplier(), 0.00001);
         try {
             Thread.sleep(2000);
         } catch (InterruptedException ie) {
@@ -194,7 +194,7 @@ public class ChatCommandsTest {
         } catch (InterruptedException ie) {
             ie.printStackTrace();
         }
-        Assert.assertEquals(1.0, GameState.getSpeedMultiplier(), 0.00001);
+        Assert.assertEquals(1.0, GameState.getServerSpeedMultiplier(), 0.00001);
         mst.terminate();
         host.setSocketToClose();
         client.setSocketToClose();