Why rewrite ?

- want incompatible data format
   - .top* is namespace pollution, want .topbloke/*
   - need new dependency tracking
       needed for dependency removal
   - need new data versioning
       needed to allow future forward-compatible-only changes
   - need new branch name
       needed to allow branch "removal" (ie, hiding)

- therefore project needs new name

- existing code has bugs
    merge .topmsg, .topdeps
    merge ordering

- wrong implementation language IMO

- maintainership change

So overhaul and review needed of all core functions to support new
semantics; result is not compatible; not much code will end up copied