Add ResidualVM support

[ResidualVM](http://www.residualvm.org/) is a cross-platform 3D game interpreter which allows you to play LucasArts' Lua-based 3D adventures: Grim Fandango and Escape from Monkey Island.

Copied the ScummVM runner and changed a few options. Won't install since Lutris doesn't yet host it. Mind throwing it up:
* http://www.residualvm.org/downloads/residualvm-linux32.tar.gz
* http://www.residualvm.org/downloads/residualvm-linux64.tar.gz

## Games
* https://lutris.net/games/escape-from-monkey-island/
* https://lutris.net/games/grim-fandango/
Hm, this is the path to the directory, not to the executable. ?¿