Merge pull request GeyserMC#13 from phase/master

Change Disconnect message to the Throwable's message

src/main/java/org/spacehq/packetlib/tcp/TcpSession.java

@@ -352,7 +352,7 @@ public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
         } else if(cause instanceof WriteTimeoutException) {
             message = "Write timed out.";
         } else {
-            message = "Internal network exception.";
+            message = cause.toString();
         }
 
         this.disconnect(message, cause);