Idea: launcher GUI

3RD and I agreed on Discord that a launcher GUI that allows the player to choose various parameters on startup would be a great addition. Examples:

- OpenGL on/off
- texture filtering on/off
- other possible OpenGL specific features on/off
- fullscreen vs. windowed
- resolution selector
- show or hide console output
- mod selector
- save file to continue from, possibly picking up all of the above from that save's preferences

Making such a thing is of course time consuming, but would go a long way toward user friendliness.