[#79853] Use YYYYMMDD as "Line Reference" in XLS

There is a version for NU that builds from this.
I'm wondering if we should do something like this: http://stackoverflow.com/questions/9467034/rails-i18n-how-to-handle-case-of-a-nil-date-being-passed-ie-lnil

I think that might save us a lot of headaches, and a lot of code. That might be a bigger refactor than we want to do right now.