These `'ascender'` type strings that used to be in `webfont.modules.Ascender.NAME` are actually really important that they're constant and unchanging since they're the strings that end-users of this JS library use in the configuration block to pass configuration to each of the modules, right? Given that, I think I'd be a lot more comfortable leaving them each in their respective module file and defined as a constant, and just referenced here. I think it's good to have the canonical string that you use to address each module in the same file as the module file itself. What do you think?