Grady/authoring/rubric gui

Very Close (not complete front end work, and some deletion JS needs to be tweaked.  Other than that, it is ready for code review!  Going to be done tomorrow!
I'm concerned about this section.  Unless there's a really, really good reason, the JavaScript shouldn't need to construct HTML or introspect attribute values.  Doing so tightly couples the JavaScript with the CSS/HTML, which makes CSS and template changes riskier.