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/
They do have a generic daily build of ResidualVM in [the daily builds](http://www.residualvm.org/downloads/#daily), and it's quite easy to compile. We could host it on Lutris. Up to you, and how the package is distributed. I believe it ended up at ResidualVM/ResidualVM for me when I did it.