Tags resource and silencer

* add logger setting
* fix tag attribute
Yeah I just fixed that as well locally. This method still doesn't work. Tags don't have IDs. It seems like this should be ```get_tags``` not ```get_tag(id:)```. The API docs of course are wrong. I tried just GET .../tags and it returned 404 so I currently have no idea what the implementation is supposed to be. It's not really important because tags can just be added directly as an array of hashes on the resource e.g. organisations. I didn't pick this error up because I've missed the specs for this resource. We should add specs for it at some point if we can figure out what the heck the implementation is supposed to be.