Ability to load a game trough command line stdin

[L0laapk3]

Currently, the only documented way to be able to load games programmatically is by starting factorio.exe with the --load-game parameter. It would be nice if this same functionality would be possible on an already running game by sending it a command trough stdin.

Factoriomaps heavily depends on the --load-game parameter and needlessly restarts the game several times just to be able to load a savefile. When there are a lot of mods involved, this really wastes a lot of time. It would be nice if all the restarting could be avoided and I could simply tell the game to move on to the next savefile.

This could also be useful for automated tests for you guys (If such a feature does not exist already, maybe it does and I just don't know about it!).