* accept hot module changes, move routes into root component
* Fix "You cannot change <Router routes>; it will be ignored" error message by implementing solution in Github: https://github.com/ReactTraining/react-router/issues/2704#issuecomment-211352123
Router is only instantiated once in a production setting (e.g. not webpack-dev-server), so there is minimal overhead on producing a random key value for `Router`.
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