Add api.MassUploadController [refs #83712908]
Add util.MassUploadControllerMethods

[refs #83712908]
Nudge MassUploadControllerMethods abstraction

[refs #83712908]
More refactoring [refs #83712908]
Remove MassUploadFileIteratee. Finally.

[refs #83712908]
Remove SaneRange. What was that? :)