Fixing everything for questions/answers

This is a big commit b/c it's all tied together and I didn't pay attention.

* Fix editing questions/answers bug by passing id in params
* Allow deletion w/ edits to models, params, and form
* Add dependent: :destroy
* Prevent creation of blank objects using models
* Show option to delete on edit but not new
* Move newly complicated fields into partials
I want Eric's opinion on the best place to put it. In a module? In the surveys model? answers model? elsewhere?