refactor create and destroy methods in controllers

pulled all of the respond_to stuff in these methods into ApplicationController
respond_to_create and respond_to_destroy.
These two methods could still do with a refactor -
they are very similar,
and they should take a hash instead of a list.
I'd like to see what CodeClimate thinks of this before I do more
refactoring,
though -
we've got other fish to fry.
make application_controller helpers accept hashes
Merge pull request #68 from nbirnel/smell

Smell