Rest API (#51)

* switch to go's dep

* Rest API, endpoints endpoint

* Fix fmt

* replace dockertest + redis with redigomock, gnarly but it works

* put the api server on the right listener 🤦

* use TLS matcher for the API

* remove port binding, only works with TLS shared port

* include region in endpoint information

* cache go dep vendor directory

* Accounce current server in redis sorted set

* Use RFC3339 time format for serialization instead of t.String() [fixes #48]

* server announces itself for discovery, will be used by clients soon

* new certs for dev

* set s3 bucket policy to public to download wormhole

* install mc locally

* try setting public only for the linux build

* don't mess with policies, I set it as a S3 bucket policy

* format time with RFC3339

don't build on other versions than 1.10

overwriting makes the most sense, removing not so much

Cut v0.5.36

add dev dependencies to `make setup` (#12)

* add dev dependencies to `make setup`
* golint fix
* update README

tag client_addr in session errors

change conn metrics types

- conn duration per-cluster only (bc if you have summary paritioned by
  other labels (e.g. backend) you can't recompute the percentile)
- bytes sent/received should really be counters

track metrics of ingress conns

properly shutdown and restart client when error occurs

- also detect when keepalive has fallen behind and terminate the client

list proper hostname in bugsnag