Roguelike Tutorial 2021 in DragonRuby

Following along the tutorial at http://rogueliketutorials.com/tutorials/tcod/v2/ and porting it to DragonRuby

https://www.reddit.com/r/roguelikedev/comments/o5x585/roguelikedev_does_the_complete_roguelike_tutorial/

Title Screen adapted from: https://pixabay.com/illustrations/spiral-perspective-time-traveler-2343173/