Merge pull request #24 from bakins/add-go-setup

Add go setup

Merge pull request #23 from bakins/use-goreleaser

Add goreleaser

- Add metric "jobs_waiting" (#11, @njam)

- Fix duplicate metric in readme (#9, @njam)

- Readme structure (#10, @njam)
- Add Dockerfile (#5, @njam)

- Change metric names (#8, @njam)

- Change default port to 9418 (#3, @njam)

- Replace script/build with a Makefile (#4, @njam)
- Move gearman version label from "up" to separate metric "version_info" (#6, @njam)
- Don't unregister 'go' and 'process' collectors (#7, @njam)

add vendored stuff