Implemented new client - server handshake protocol

- Implemented new packet types
- Changed server & client logic to use new protocol

Tags: #story[1124] (Issue 39)

src/main/java/seng302/gameServer/server/messages/RegistrationRequestMessage.java

@@ -0,0 +1,22 @@
+package seng302.gameServer.server.messages;
+
+
+public class RegistrationRequestMessage extends Message {
+    private static int MESSAGE_LENGTH = 2;
+
+    public RegistrationRequestMessage(ClientType type){
+        setHeader(new Header(MessageType.REGISTRATION_REQUEST, 1, (short) getSize()));
+
+        allocateBuffer();
+        writeHeaderToBuffer();
+
+        putInt(type.getCode(), 2);
+
+        writeCRC();
+    }
+
+    @Override
+    public int getSize() {
+        return MESSAGE_LENGTH;
+    }
+}