Simple support for resolving the "it" pronoun.
Look command checks open containers. Opening a container automatically searches it. Minor copy edit.
Commands and grammar words are case-insensitive.
Base engine stops running when character is in a GameOverState.
Plot#load_script (and Plot#require_script) use $LOAD_PATH for file resolution. The .rb extension is optional.
Room mode module.
Case-insensitive check for verb when command fails.