put gpsbabel.rb utility function inside namespace

Although, @radeksimko, the trick itself seems to have stopped working.

@phinze, soliciting your advice on whether this is the best way to do such namespacing in principle.
This can just be `module Utils` because it is inside the `Gpsbabel` class, which also serves as a namespace.

Then since the reference is also within the same class, you can just say `Utils.get_token`

Though honestly you could probably just define it as a class method on `Gpsbabel` itself.

Also hi @rolandwalker !! I will be back :soon: and ready to help out with the big push for getting upgrade done! :+1: