Console application without GUI

If this should be a serious server, then there must be a console application without GUI. I'm currently hosting the server with GUI on my Raspberry Pi, and having to run a X server is some overhead. Have a look at my code and see what you think. I'm not great at Qt/C++, but I'm a quick learner.

I added a stop command, it stops the server and saves the ponies. Although it closes the server before disconnecting, so everyone who are connected will not recieve the "server has closed" message, so that can be improved upon.

Also, I suppose the whole need for Widget can be removed, as there no longer is a GUI.

Also somehow commits from master are shown, I dunno why. I'm new to pull-requests! :D