New default HUD

[Keprohm]

I'm currently working on a new default HUD. I'm quite happy of how it currently looks, but many things are still to be done I guess.
Many of the methods used are kinda hacky or could be better implemented, so any help is welcome (please use Pull Requests : https://github.com/ObaniGemini/sauerbraten_menu/pulls )

Link : https://github.com/ObaniGemini/sauerbraten_menu

Features :
- Many GUI reworks and colorzations
- Map classification per size
- A recording menu
- A new Gamemode selection menu
- Other stuff I'm too bored to list

Warning : this can maybe mess up your configuration, so backup your config.cfg files !