Started working on the boat selection screen.

Customised the boat customisation UI to contain it. Need to have another boat to test whether we can switch boats and also if the messages get sent correctly.

#story[1274]

src/main/java/seng302/model/ServerYacht.java

@@ -421,4 +421,7 @@ public class ServerYacht {
         return boatColor;
     }
 
+    public void setBoatType(String boatType) {
+        this.boatType = boatType;
+    }
 }