Updated to latest version of om/clojure/clojurescript w/minor fix

Updates to latest version of clojurescript (and a few others) per christopherbalz in issue #1(https://github.com/zaiste/atw-om/issues/1.  

After that update an infinite stream of the following errors is produced: "Uncaught Error: No protocol method ICollection.-conj defined for type cljs.core/Atom:"  That's resolved by moving the initialization of :widgets out of IInitState and into IWillMount (since :widgets is part of app-state and not component local state)

Thanks for creating atw-om, it helped me connect a number of dots!