Name importers according to reverse DNS of service

[lorenzleutgeb]

Please consider naming importers in knut according to the reverse DNS name of the "main" domain they communicate with, or the service that they interoperate with. That is, "com.revolut" instead of "revolut" and "com.interactivebrokers" instead of "us.interactivebrokers". There'll probably be many entries for "com", but it'd be a little more predictable.

[sboehler]

Good idea, why not!