added comments and fleshing out poll_updater
began unit testing poll_updater
changed around req_res to { req, res }, among other changes
changed typo to pass in url_id in form hidden value
only thing left is to update with mongo
transitioning to poll_results with object name as vote name
updating votes' voter_names works, need to implement incrementing vote count
added another task to todo
trying to refactor callback hell in poll_updater
decided not to refacto callback hell, splitting it up would be more confusing.  atleast here's it only one nested callback
bad code
got the mongo update null bug fixed.  it was pair of curly braces.  good to go, just need to touch up tests
touched up integration test
removed num_votes, added count.  tested voter_names append and count properly in integration testing
removed debugging print statements
added link path parsing, now need to refactor into poll_results class
refactoring retrieve and render to its own class
i think poll_retriever class works
removed commented-out retrieve poll stuff
changed to { url_id, res }