suffixes for queues and exchanges

[hefekranz]

This is not really an issue, but more a proposal: By default all queues and exchanges are suffixed with "-queue" and "-exchange". That can be a real problem, since the library dictates the naming of the interface, if you have an environment with predefined exchanges from other or former services, you can't hook in there using Thumper. I understand that this is a breaking change for people who adopted this behavior, but maybe you consider it for a future release.