hpd-versions: new command for easy to parse versions info
main use case: displaying detailed version info in the Rails UI (heptapod#199 (closed), heptapod#271 (closed))
- the information we need
- as JSON, since parsing that is a solved problem
main use case: displaying detailed version info in the Rails UI (heptapod#199 (closed), heptapod#271 (closed))