ChangedOpenRig 0.6.78 October 2026

The README, reference guides, architecture docs and changelog were brought up to date for 0.6.6 and then 0.6.7.

The reference guides were brought to the 0.6.6 release, the architecture docs restamped to it and CHANGELOG.md gained its 0.6.6 section; the README and reference guides were then brought to 0.6.7.