* Remove some lightly used or unused dbFacile functions
['NULL'] legacy behavior seems unsupported, replace with actual nulls
* Fix refactor mishap
* another
* update baseline
* these were very wrong... what happened?
* Refactor common billing code into a namespace
Prevents issues of usages where the code hasn't been loaded.
* remove redundant Billing in method names
* remove accidental duplication
* more use statements
* Style fixes