Reformats README

Moves comments from game.rb to readme.md
Makes method names consistent
Refactored commands into `#parse_command` method
Merge pull request #2 from migueog/refactor-commands

Refactor commands
Fixes formatting in README
Adds connections that are aware if they are locked or not

I don’t really like how the rooms are described in the game setup with {"1" => :locked} so I’m open to suggestions. The parsing of `room.values.first` is sketchy.