Miscellaneous updates and fixes

[tripu]

• Add function renderItem() (recycled from Unitas; not used yet) for better and more consistent rendering. WIP.
• Avoid one string literal; use config constant instead.
• Remove a couple of spurious console.log() instances.
• Group example: change WG (the previous one is closed now); show also specs, members and participants.
• Update year in copyright notices.
• Increase patch version.