introduce Phase description text
extract/insert Level description text
Introduce new Phases.  Rename phases appropriately, minor refactoring.
renumber the Phase files
move missions into "Staging Level"
refactoring mission filenames
upgraded mission list
experiments with moving the next objective description into that objective.
we actually don't want a fresh message for the new objective. find a way of putting it into the previous success message.
refactoring, to move the the description of each objective into that objective, not to store it in the success message for the previous objective
make the SE target louder and further away. It was confusing where it was closer but unheard.
reflect changed name
more polish
merge-commit, to update sources
put the welcome message back into the async start code block.
refactoring, to make space for pre-ambiguous bearing level
physics acceptable.
early cut of mission schema
introduce schema viewer
schema file moved