Update Router.js
Update Router.js

Left a variable out of the constructor. Badly need some tests to catch issues like this.
jontewks/falcor-router,drager/falcor-router,mitel/falcor-router,Netflix/falcor-router,michaelbpaulson/falcor-router,osxi/falcor-router,kristianmandrup/falcor-router,jmnarloch/falcor-router,trxcllnt/falcor-router