Getting boat locations from race simulator & bug fixes

- Boat locations that are generated by the simulator are sent to the client as they happen
- Fixed heading and lat/lon encoding
- Fixed a bug where the header wasn't included in the sent byte stream
- Fixed the format of data as it's sent to the client.
- Data is now sent using a channel
- Removed tests that don't work with channels

Tags: #story[829]

src/main/java/seng302/server/messages/Heartbeat.java

@@ -3,6 +3,9 @@ package seng302.server.messages;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.nio.channels.Channels;
+import java.nio.channels.SocketChannel;
+import java.nio.channels.WritableByteChannel;
 import java.util.zip.CRC32;
 
 public class Heartbeat extends Message {
@@ -23,7 +26,7 @@ public class Heartbeat extends Message {
     }
 
     @Override
-    public void send(DataOutputStream outputStream) {
+    public void send(SocketChannel outputStream) throws IOException {
         setHeader(new Header(MessageType.HEARTBEAT, 0x01, (short) getSize()));
 
         allocateBuffer();
@@ -33,10 +36,6 @@ public class Heartbeat extends Message {
 
         writeCRC();
 
-        try {
-            outputStream.write(getBuffer().array());
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+        outputStream.write(getBuffer());
     }
 }