second attempt - more structured and reusable +web

first console script has been refactored in order
to increase reusability, unit test and two
user interfaces (which reuse common code)
have been prepared

console interface is finished,
web interface is working but just a proof of concept
just one game can be played with one hard-wired set
of players

TODO: users registration, enforcing rules on who can
decide about roll, rewrite UI to web 2.0