Update @Meatballs1 and @FireFart in authors.rb

Over the time that contributors @Meatballs1 and @FireFart have been pumping out modules, sometimes they use slightly different names and e-mail addresses. This screws up their scoreboards.

This PR normalizes all of that by adding them to `authors.rb` and fixing to one e-mail address.

## Verification

- [ ] Run `msfconsole -L` and see that no modules fail to load
- [ ] Run `tools/module_author.rb -rs | grep -i firefart` and see uniformity of name and e-mail address
- [ ] Run `tools/module_author.rb -rs | grep -i meatballs` and see uniformity of name and e-mail address