Dedicated server

Dedicated server support can be implemented by making use of [SteamCMD](https://developer.valvesoftware.com/wiki/SteamCMD). Once the game is installed on the host of choice, it can be started with the `-batchmode` and `-nographics` flags. This will prevent the game from trying to load a graphical environment. We can then check the arguments for one of our own, being which save to load, and from what user. If that argument is present, and the user and save are valid, we can automatically load into the session, which will then be ready for players to join.