* start centralizing negotiation logic for API
* swagger document nodeinfo endpoint
* go fmt
* document negotiate function
* use content negotiation
* tidy up negotiation logic
* negotiate content throughout client api
* swagger
* remove attachment on Content
* add accept header to test requests
* start experimenting with swagger documentation
* further adventures in swagger
* do a few more api paths
* account paths documented
* go fmt
* fix up some models
* bit o lintin'