Added the barebones version of the game-repl (which is inadequate for the game's purposes), and added the game-read, which reads terminal commands for the game in a more natural (w.r.t. text-based games) fashion.
Replaced the original read with game-read - this causes buggy behavior when we introduce weird or NIL input.
Fixed some documentation, implemented a catch for blank input in the (game-read) function, and took a step toward completing the game-repl by swapping (eval …) for (game-eval …)