Simply dependency spec (locked anyway)

Bump dependencies and update to current Trussed API

Bump rand_core to 0.6 in line with Trussed itself

Keep in line with upstream Trussed changes

Update Cargo.lock

Adjust to Trussed changes

Trussed is now registered as trademark

Not more generic than necessary

Adjust to Trussed improvements

License

Actually check UP, more docs

More documentation

Simplify, error handling, adjust to Trussed™ board->platform rename

Use published dependencies

Initial sketch