* add: X-Circonus-Check-ID header to /write and /prom PUT|POST request responses * add: X-Circonus-Check-Bundle-ID header to /write and /prom PUT|POST  request responses
* add: X-Circonus-Check-ID header to /write and /prom PUT|POST request responses
* add: X-Circonus-Check-Bundle-ID header to /write and /prom PUT|POST 
request responses

maier/circonus-agent,maier/circonus-agent,maier/circonus-agent