next (v2.2) nodeinfo schema version

[6543]

summary about v2.2 dev

• [x] create new files (#74)
• [ ] opt-out for crawler (#75, #82)
• [ ] report admin/maintain contact(s) (#83 vs. #84)
• [x] report instance details
  • [x] Name (#77)
  • [x] Description (#78)
  • [x] Weekly stats (#81)