Update regex.js.coffee

Added regex for the roll command
Update client.js.coffee

Catch roll commands if they equal the regex we just added. Then emit a message to the server to handle the dice roll.
Update ChatServer.coffee

Added the server response to the roll command. Hope I formatted that right.
Update ChatServer.coffee
Update README.md

Updated README so it includes the /roll command.
Update README.md

Better readme entry
Update client.js.coffee

Forgot to remove trailing ';'
Update ChatServer.coffee

Accidently left in a var
Update ChatServer.coffee

Formatting
Got the coffee version to atleast run, but still not getting any response from trying to roll
Fixed regex to support /roll with unspecific dice and /r. Fixed issue with coffee script in chatserver.
Actually works, still not ideal
refactor Dice into a server extension, added tests, made ChatServer side of things much smaller weight
update README