Added winner detection

Hi Logan, 

I've made changes you wanted in regards to:
  - having the winning message in the instructions container
  - the controls disabled when winner is found
  - clojure style formatting

This can be tested at the following address.

https://rawgithub.com/xpika/nonaga/with-build/resources/index.html

file changes summary:
--valid_marble_moves.cljs
changed marble move function to fire :game_won event if winner found

--ball.cljs
added function find-winner

--index.html
removed winner detection omission message

--instructions.cljs
added new event for instructions

Regards,

Alan Hawkins