* Some code cleanup: spaces -> indents
* Resolve TODO removing Message.MetaCategories: Just use string names
* Misc ES5 -> ES6
* Fix bug in module loader when require() fails
* Some DRY in new_scan.js
* Minor updates to ES6 in some areas
* Better bbs.js startup seq
* Better iterator support for loadModulesForCategory()
* Start work on loading message network modules & tieing in record() (WIP)
* FTN PacketHeader is now a ES6 class
* Various FTN utils, e.g. Via line creation
* module cleanup: some simple modules moved to general_menu_method.js @methods
* More work on menu configuration & options
- Removed formatting of args for now. Too tied to MCI, not really needed with argName stuff