Bring trust policy documentation up to date
Closes #31 (closed). Part of #25 (closed). Somewhat related to #35 (moved). Refactors the description language (no json schema) similar to !8 (merged).
Closes #31 (closed). Part of #25 (closed). Somewhat related to #35 (moved). Refactors the description language (no json schema) similar to !8 (merged).